Bug#645055: realtek 8188CE ad-hoc mode not supported

10-12-2011, 05:29 AM

Package: linux-2.6
Version: 2.6.39-3~bpo60+1
Severity: normal
Tags: upstream

Hi,

The documentation for the rtl8192ce driver explicitely mentions that
it supports ad-hoc mode, yet, on the rtl8188CE card I have here (which
is advertised as supported both by the upstream driver and the driver
in the linux source), the ad-hoc mode yields this error:

root@angela:/home/anarcat# iwconfig wlan0 mode Ad-hoc essid foo
Error for wireless request "Set Mode" (8B06) :
SET failed on device wlan0 ; Device or resource busy.

I have tried changing the case of the "ad-hoc" word and various
spellings, nothing works there. I have also tried the upstream driver
available here:

http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PFid=48&Level=5&Conn=4 &ProdID=278&DownTypeID=3&GetDown=false&Downloads=t rue

without any more luck, which means this is a problem with upstream (or
with the card not supporting ad-hoc mode at all, although that would
be very surprising).

-- Package-specific info:
** Version:
Linux version 2.6.39-bpo.2-686-pae (Debian 2.6.39-3~bpo60+1) (norbert@tretkowski.de) (gcc version 4.4.5 (Debian 4.4.5-8) ) #1 SMP Thu Aug 4 11:02:22 UTC 2011

** Command line:
BOOT_IMAGE=/vmlinuz-2.6.39-bpo.2-686-pae root=/dev/mapper/angela-root ro quiet

** Tainted: O (4096)
* Out-of-tree module has been loaded.

** Model information
not available

** Loaded modules:
Module Size Used by
rtl8192ce 123507 0
rtlwifi 96056 1 rtl8192ce
mac80211 164606 2 rtl8192ce,rtlwifi
cfg80211 107076 2 rtlwifi,mac80211
parport_pc 21895 0
ppdev 12621 0
lp 12858 0
parport 27018 3 parport_pc,ppdev,lp
mperf 12387 0
cpufreq_conservative 12987 0
cpufreq_stats 12711 0
cpufreq_userspace 12520 0
cpufreq_powersave 12422 0
bridge 59217 0
stp 12368 1 bridge
bnep 17147 2
rfcomm 31961 4
binfmt_misc 12778 1
uinput 12984 1
fuse 55666 1
radeon 712182 2
ttm 46736 1 radeon
drm_kms_helper 26550 1 radeon
drm 129190 3 radeon,ttm,drm_kms_helper
btusb 17209 0
bluetooth 92361 11 bnep,rfcomm,btusb
crc16 12327 1 bluetooth
i2c_algo_bit 12706 1 radeon
joydev 16906 0
snd_hda_codec_conexant 35673 1
snd_hda_codec_hdmi 21870 1
snd_hda_intel 21529 0
snd_hda_codec 57741 3 snd_hda_codec_conexant,snd_hda_codec_hdmi,snd_hda_ intel
snd_hwdep 12906 1 snd_hda_codec
snd_pcm_oss 35864 0
snd_mixer_oss 17649 1 snd_pcm_oss
snd_pcm 52731 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd _pcm_oss
snd_seq_midi 12744 0
snd_rawmidi 22407 1 snd_seq_midi
snd_seq_midi_event 13124 1 snd_seq_midi
arc4 12418 2
ecb 12649 2
snd_seq 39172 2 snd_seq_midi,snd_seq_midi_event
snd_timer 22171 2 snd_pcm,snd_seq
rtl8192c_common 43386 0
uvcvideo 52490 0
snd_seq_device 12995 3 snd_seq_midi,snd_rawmidi,snd_seq
thinkpad_acpi 46976 0
videodev 61226 1 uvcvideo
nvram 12853 1 thinkpad_acpi
tpm_tis 12949 0
snd 38189 13 snd_hda_codec_conexant,snd_hda_codec_hdmi,snd_hda_ intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixe r_oss,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_se q_device,thinkpad_acpi
tpm 17476 1 tpm_tis
ac 12552 0
evdev 17180 28
media 13692 1 videodev
video 17345 0
battery 12957 0
tpm_bios 12799 1 tpm
psmouse 45863 0
power_supply 13283 3 radeon,ac,battery
serio_raw 12758 0
wmi 13018 0
rfkill 18510 5 cfg80211,bluetooth,thinkpad_acpi
button 12783 0
i2c_piix4 12480 0
pcspkr 12515 0
processor 26983 2
i2c_core 19022 6 radeon,drm_kms_helper,drm,i2c_algo_bit,videodev,i2 c_piix4
k10temp 12539 0
soundcore 12878 1 snd
snd_page_alloc 12841 2 snd_hda_intel,snd_pcm
ext3 102125 4
jbd 40818 1 ext3
mbcache 12810 1 ext3
sha256_generic 16709 2
cryptd 14071 0
aes_i586 16608 4
aes_generic 37066 1 aes_i586
cbc 12659 2
dm_crypt 17809 1
raid10 25831 0
raid456 51462 0
async_raid6_recov 12459 1 raid456
async_pq 12503 2 raid456,async_raid6_recov
raid6_pq 86733 2 async_raid6_recov,async_pq
async_xor 12390 3 raid456,async_raid6_recov,async_pq
xor 21454 1 async_xor
async_memcpy 12363 2 raid456,async_raid6_recov
async_tx 12510 5 raid456,async_raid6_recov,async_pq,async_xor,async _memcpy
raid1 25752 0
raid0 16828 0
multipath 12832 0
linear 12665 0
md_mod 80556 6 raid10,raid456,raid1,raid0,multipath,linear
dm_mirror 17249 0
dm_region_hash 13072 1 dm_mirror
dm_log 13269 2 dm_mirror,dm_region_hash
dm_mod 56401 14 dm_crypt,dm_mirror,dm_log
sd_mod 35060 4
crc_t10dif 12332 1 sd_mod
usb_storage 34951 0
uas 12975 0
ohci_hcd 21898 0
ahci 20897 3
libahci 22200 1 ahci
libata 132100 2 ahci,libahci
ehci_hcd 34885 0
usbcore 99225 7 btusb,uvcvideo,usb_storage,uas,ohci_hcd,ehci_hcd
thermal 13058 0
r8169 36481 0
scsi_mod 134453 4 sd_mod,usb_storage,uas,libata
thermal_sys 17667 3 video,processor,thermal
mii 12595 1 r8169

*** Device features:
eth0: 0x4180
lo: 0x201b7c65
pan0: 0xff78e5
wlan0: 0x6000

** PCI devices:
00:00.0 Host bridge [0600]: Advanced Micro Devices [AMD] Device [1022:1510]
Subsystem: Advanced Micro Devices [AMD] Device [1022:1510]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64

00:01.0 VGA compatible controller [0300]: ATI Technologies Inc Device [1002:9802] (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 45
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=256M]
Region 1: I/O ports at 4000 [size=256]
Region 2: Memory at f0200000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: radeon

00:01.1 Audio device [0403]: ATI Technologies Inc Device [1002:1314]
Subsystem: ATI Technologies Inc Device [1002:1314]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin B routed to IRQ 44
Region 0: Memory at f0244000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel

00:06.0 PCI bridge [0604]: Advanced Micro Devices [AMD] Device [1022:1514] (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: f0300000-f03fffff
Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport

00:11.0 SATA controller [0106]: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode] [1002:4391] (prog-if 01 [AHCI 1.0])
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64
Interrupt: pin A routed to IRQ 19
Region 0: I/O ports at 4118 [size=8]
Region 1: I/O ports at 4124 [size=4]
Region 2: I/O ports at 4110 [size=8]
Region 3: I/O ports at 4120 [size=4]
Region 4: I/O ports at 4100 [size=16]
Region 5: Memory at f024a000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ahci

00:12.0 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller [1002:4397] (prog-if 10 [OHCI])
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at f0249000 (32-bit, non-prefetchable) [size=4K]
Kernel driver in use: ohci_hcd

00:12.2 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI Controller [1002:4396] (prog-if 20 [EHCI])
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin B routed to IRQ 17
Region 0: Memory at f024a500 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd

00:13.0 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller [1002:4397] (prog-if 10 [OHCI])
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at f0248000 (32-bit, non-prefetchable) [size=4K]
Kernel driver in use: ohci_hcd

00:13.2 USB Controller [0c03]: ATI Technologies Inc SB700/SB800 USB EHCI Controller [1002:4396] (prog-if 20 [EHCI])
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin B routed to IRQ 17
Region 0: Memory at f024a400 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd

00:14.0 SMBus [0c05]: ATI Technologies Inc SBx00 SMBus Controller [1002:4385] (rev 42)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap- 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Kernel driver in use: piix4_smbus

00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia (Intel HDA) [1002:4383] (rev 40)
Subsystem: Lenovo Device [17aa:21df]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at f0240000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel

00:14.3 ISA bridge [0601]: ATI Technologies Inc SB700/SB800 LPC host controller [1002:439d] (rev 40)
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0

00:14.4 PCI bridge [0604]: ATI Technologies Inc SBx00 PCI to PCI Bridge [1002:4384] (rev 40) (prog-if 01 [Subtractive decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64
Bus: primary=00, secondary=02, subordinate=02, sec-latency=64
Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-

00:15.0 PCI bridge [0604]: ATI Technologies Inc Device [1002:43a0] (prog-if 00 [Normal decode])
Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport

00:15.1 PCI bridge [0604]: ATI Technologies Inc Device [1002:43a1] (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: f0100000-f01fffff
Prefetchable memory behind bridge: 00000000f0400000-00000000f05fffff
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport

00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 0 [1022:1700] (rev 43)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 1 [1022:1701]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 2 [1022:1702]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 3 [1022:1703]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Capabilities: <access denied>
Kernel driver in use: k10temp

00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 4 [1022:1704]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.5 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 6 [1022:1718]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.6 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 5 [1022:1716]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:18.7 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 7 [1022:1719]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 03)
Subsystem: Lenovo Device [17aa:21df]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 43
Region 0: I/O ports at 3000 [size=256]
Region 2: Memory at f0004000 (64-bit, prefetchable) [size=4K]
Region 4: Memory at f0000000 (64-bit, prefetchable) [size=16K]
Expansion ROM at f0020000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: r8169

04:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8195]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 17
Region 0: I/O ports at 2000 [size=256]
Region 2: Memory at f0100000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: rtl8192ce

** USB devices:
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 5986:01a6 Acer, Inc Lenovo Integrated Webcam
Bus 002 Device 002: ID 0bda:0158 Realtek Semiconductor Corp. USB 2.0 multicard reader
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

-- System Information:
Debian Release: 6.0.2
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.39-bpo.2-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to fr_CA.UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages linux-image-2.6.39-bpo.2-686-pae depends on:
ii debconf [debconf-2.0] 1.5.36.1 Debian configuration management sy
ii initramfs-tools [linux-init 0.99~bpo60+1 tools for generating an initramfs
ii linux-base 3.2 Linux image base package
ii module-init-tools 3.12-1 tools for managing Linux kernel mo

Versions of packages linux-image-2.6.39-bpo.2-686-pae recommends:
ii firmware-linux-free 2.6.32-35squeeze2 Binary firmware for various driver
ii libc6-i686 2.11.2-10 Embedded GNU C Library: Shared lib

Versions of packages linux-image-2.6.39-bpo.2-686-pae suggests:
ii grub-pc 1.98+20100804-14 GRand Unified Bootloader, version
pn linux-doc-2.6.39 <none> (no description available)

Versions of packages linux-image-2.6.39-bpo.2-686-pae is related to:
pn firmware-bnx2 <none> (no description available)
pn firmware-bnx2x <none> (no description available)
pn firmware-ipw2x00 <none> (no description available)
pn firmware-ivtv <none> (no description available)
pn firmware-iwlwifi <none> (no description available)
ii firmware-linux 0.32~bpo60+1 Binary firmware for various driver
ii firmware-linux-nonfree 0.32~bpo60+1 Binary firmware for various driver
pn firmware-qlogic <none> (no description available)
pn firmware-ralink <none> (no description available)
pn xen-hypervisor <none> (no description available)

-- debconf information excluded

--
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10-12-2011, 01:08 PM

On Wed, 2011-10-12 at 01:29 -0400, Antoine Beaupré wrote:
> Package: linux-2.6
> Version: 2.6.39-3~bpo60+1
> Severity: normal
> Tags: upstream
>
> Hi,
>
> The documentation for the rtl8192ce driver explicitely mentions that
> it supports ad-hoc mode, yet, on the rtl8188CE card I have here (which
> is advertised as supported both by the upstream driver and the driver
> in the linux source), the ad-hoc mode yields this error:
>
> root@angela:/home/anarcat# iwconfig wlan0 mode Ad-hoc essid foo
> Error for wireless request "Set Mode" (8B06) :
> SET failed on device wlan0 ; Device or resource busy.
[...]

Can you create an ad-hoc interface like this:

iw dev wlan0 interface add wlan1 type adhoc

(you'll need the iw package).

Ben.

--
Ben Hutchings
If at first you don't succeed, you're doing about average.

10-12-2011, 03:20 PM

On Wed, 12 Oct 2011 14:08:32 +0100, Ben Hutchings <ben@decadent.org.uk> wrote:
> Can you create an ad-hoc interface like this:
>
> iw dev wlan0 interface add wlan1 type adhoc
>
> (you'll need the iw package).

Interesting - this works. Didn't know of the iw tool. But this creates a
separate interface, kind of odd!

The adhoc mode works like that. I am not sure I understand why it
doesn't work with iwconfig, can you enlighten me?

Thanks!

--
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- Léo Ferré, "Préface"

10-12-2011, 04:01 PM

On Wed, Oct 12, 2011 at 11:20:31AM -0400, Antoine Beaupré wrote:
> On Wed, 12 Oct 2011 14:08:32 +0100, Ben Hutchings <ben@decadent.org.uk> wrote:
> > Can you create an ad-hoc interface like this:
> >
> > iw dev wlan0 interface add wlan1 type adhoc
> >
> > (you'll need the iw package).
>
> Interesting - this works. Didn't know of the iw tool. But this creates a
> separate interface, kind of odd!
>
> The adhoc mode works like that. I am not sure I understand why it
> doesn't work with iwconfig, can you enlighten me?

iwconfig uses the original WEXT (wireless extensions) configuration
interface. This interface was never very well specified and was
implemented in inconsistent ways by different drivers.

The newer configuration interface used by iw, Network Manager and
other tools is nl80211 (netlink for IEEE 802.11).

http://linuxwireless.org/en/developers/Documentation/Wireless-Extensions
http://linuxwireless.org/en/developers/Documentation/nl80211

Ben.

--
Ben Hutchings
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- Albert Camus

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10-12-2011, 11:24 PM

On Wed, 2011-10-12 at 17:01 +0100, Ben Hutchings wrote:
> On Wed, Oct 12, 2011 at 11:20:31AM -0400, Antoine Beaupré wrote:
> > On Wed, 12 Oct 2011 14:08:32 +0100, Ben Hutchings <ben@decadent.org.uk> wrote:
> > > Can you create an ad-hoc interface like this:
> > >
> > > iw dev wlan0 interface add wlan1 type adhoc
> > >
> > > (you'll need the iw package).
> >
> > Interesting - this works. Didn't know of the iw tool. But this creates a
> > separate interface, kind of odd!
> >
> > The adhoc mode works like that. I am not sure I understand why it
> > doesn't work with iwconfig, can you enlighten me?
>
> iwconfig uses the original WEXT (wireless extensions) configuration
> interface. This interface was never very well specified and was
> implemented in inconsistent ways by different drivers.
>
> The newer configuration interface used by iw, Network Manager and
> other tools is nl80211 (netlink for IEEE 802.11).
[...]

I looked a little further and saw that nl80211 does support changing
interface type (mode). But this driver (rtl8192ce) only supports
creating new interfaces, not changing their type.

Should mac80211 drivers generally support changing interface type
(change_interface operation)?

Ben.

--
Ben Hutchings
Quantity is no substitute for quality, but it's the only one we've got.

10-13-2011, 01:46 AM

On Thu, 13 Oct 2011 00:24:12 +0100, Ben Hutchings <ben@decadent.org.uk> wrote:
> I looked a little further and saw that nl80211 does support changing
> interface type (mode). But this driver (rtl8192ce) only supports
> creating new interfaces, not changing their type.
>
> Should mac80211 drivers generally support changing interface type
> (change_interface operation)?

Seems to me really counter-intuitive that it didn't work. It was the
first time I ever see such a problem.

I have seen numerous drivers not support "Master" or "Monitor" mode,
because of limitations of the implementation or the hardware, but if
this is purely a API problem, it seems like a problem that should be
fixed...

Is this the right place though?

A.
--
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lead all customers out of a mire of technological chaos neatly ignores
the fact that it was he who, by peddling second-rate technology, led
them into it in the first place. - Douglas Adams (1952-2001)

10-13-2011, 02:10 AM

On 10/12/2011 06:24 PM, Ben Hutchings wrote:

I looked a little further and saw that nl80211 does support changing
interface type (mode). But this driver (rtl8192ce) only supports
creating new interfaces, not changing their type.

Should mac80211 drivers generally support changing interface type
(change_interface operation)?

I don't think that implementation of the WEXT interface is necessary. As to
using iw, the following sequence worked:

iw dev wlan14 interface add wlan15 type adhoc
iw dev set rename5 type managed
iw dev set rename5 type adhoc

Why it was called "rename5" when I asked for "wlan15" is not understood, but the
iw interface changes the mode for an existing interface when using rtl8192ce.

BTW, I added a new iface because I did not want to interrupt my internat connection.

Larry

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10-13-2011, 02:25 AM

On Wed, 2011-10-12 at 21:10 -0500, Larry Finger wrote:
> On 10/12/2011 06:24 PM, Ben Hutchings wrote:
> > I looked a little further and saw that nl80211 does support changing
> > interface type (mode). But this driver (rtl8192ce) only supports
> > creating new interfaces, not changing their type.
> >
> > Should mac80211 drivers generally support changing interface type
> > (change_interface operation)?
>
> I don't think that implementation of the WEXT interface is necessary.

The change_interface operation appears to be used in implementation of
nl80211 too.

> As to using iw, the following sequence worked:
>
> iw dev wlan14 interface add wlan15 type adhoc
> iw dev set rename5 type managed
> iw dev set rename5 type adhoc
>
> Why it was called "rename5" when I asked for "wlan15" is not understood,

udev's persistent name generator isn't able to distinguish the two
interfaces by MAC address, so it decides the new interface should also
be named 'wlan14'. udev does renaming in two steps for some reason, and
the second step obviously fails.

> but the
> iw interface changes the mode for an existing interface when using rtl8192ce.
>
> BTW, I added a new iface because I did not want to interrupt my
> internat connection.

Hmm. Maybe the change_interface operation is only needed to change
type/mode while the interface is up.

Antoine, did you bring the interface down before setting its mode?

Ben.

--
Ben Hutchings
Quantity is no substitute for quality, but it's the only one we've got.

10-13-2011, 02:31 AM

On Thu, 13 Oct 2011 03:25:17 +0100, Ben Hutchings <ben@decadent.org.uk> wrote:
> > but the
> > iw interface changes the mode for an existing interface when using rtl8192ce.
> >
> > BTW, I added a new iface because I did not want to interrupt my
> > internat connection.
>
> Hmm. Maybe the change_interface operation is only needed to change
> type/mode while the interface is up.
>
> Antoine, did you bring the interface down before setting its mode?

Crap. No, I didn't. And now it works if I bring it down first. Oh well,
I guess I just made a lot of noise for nothing, this bug can be closed,
thank you!

A.

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