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Old 05-16-2010, 02:10 PM
 
Default Stuttering DVB-T video output

Hi,

for watching DVB-T broadcasts on my PC I am using vlc,
which is fed with an appropiate channels.conf file
from the commandline.

Everything is fine so far...but...
The video output stutters, especially when switching
desktops or when scrolling html pages in firefox or...
often this happens without any additional actions on
the desktop.

lspci reports:
00:00.0 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
Subsystem: ASUSTeK Computer Inc. A8V Deluxe
Kernel driver in use: agpgart-amd64
00:00.1 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. K8T800Pro Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI bridge [K8T800/K8T890 South]
00:0a.0 Ethernet controller: Marvell Technology Group Ltd. 88E8001 Gigabit Ethernet Controller (rev 13)
Subsystem: ASUSTeK Computer Inc. Marvell 88E8001 Gigabit Ethernet Controller (Asus)
Kernel driver in use: skge
00:0d.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
Subsystem: Avermedia Technologies Inc AverMedia AVerTV DVB-T 771
Kernel driver in use: bttv
Kernel modules: bttv
00:0d.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
Subsystem: Avermedia Technologies Inc AverMedia AVerTV DVB-T 771
Kernel driver in use: bt878
Kernel modules: bt878
00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V Deluxe/K8V-X/A8V Deluxe motherboard
Kernel driver in use: sata_via
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel driver in use: pata_via
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel driver in use: ehci_hcd
Kernel modules: ehci-hcd
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T890 South]
Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard
Kernel modules: i2c-viapro
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
Subsystem: ASUSTeK Computer Inc. A8V Deluxe motherboard (Realtek ALC850 codec)
Kernel driver in use: VIA 82xx Audio
00:11.6 Communication controller: VIA Technologies, Inc. AC'97 Modem Controller (rev 80)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
Kernel driver in use: k8temp
Kernel modules: k8temp
01:00.0 VGA compatible controller: nVidia Corporation G73 [GeForce 7600 GT] (rev a2)
Subsystem: Micro-Star International Co., Ltd. Device 0640
Kernel driver in use: nvidia
Kernel modules: nvidia

uname -a reports:
Linux solfire 2.6.32.13 #1 SMP PREEMPT Sat May 15 10:14:09 CEST 2010 i686 AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ AuthenticAMD GNU/Linux

(the kernel is the vanilla version from ftp.kernel.org)

vlc is:
VLC media player 1.0.6 Goldeneye
VLC version 1.0.6 Goldeneye
Compiled by root@localhost.
Compiler: gcc version 4.3.4 (Gentoo 4.3.4 p1.1, pie-10.1.5)

vlc uses as output "default" and the rest of the configuration is on
"default" as the installation process leaves it behind.

What can I do to prevent or minimize the stuttering effect?

Thank you very much for any help in advance!

Best regards
mcc




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Old 05-16-2010, 02:51 PM
Volker Armin Hemmann
 
Default Stuttering DVB-T video output

Hi,

I am using dvb-s with kaffeine and ati and don't have any stuttering.

Do you have effects turned on? Turn them off.
Are you using the nvidia driver? Or nv? nouveau? Use nvidia.
Do you have any stupid governor turned on - like userspace? Use ondemand.
 

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