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Old 05-06-2012, 11:43 AM
Ralf Mardorf
 
Default rt prio with kernel 3.x, issue to use the vesa driver

That for a shared IRQ the graphics will become an unwanted high prio
doesn't happen with a kernel 2.6.31-rt19 + NVIDIA 195.36.15 on Suse 11.2
on my machine.
As already reported, it also doesn't happen with the kernels
3.0.23-avl-7-pae (threadirqs) and 3.0.23-rt40 on current AV Linux, where
still the nv driver is available and used on my machine.
IIUC it's definitive related to the kernel, I anyway will test the vesa
driver with Ubuntu Studio Precise, but can' get it working.
I modified the xorg.conf I use with the nvida driver, startup ends with
tty, no X. Does anybody notice what I might have missed?

Latest modification:

Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Module"
#Load "glx"
#Load "dbe"
#Load "dri2"
#Load "extmod"
#Load "record"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "de"
Option "XkbVariant" "ro"
Option "XkbOptions" "lv3:ralt_switch"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
DisplaySize 305 230
HorizSync 29-98
VertRefresh 50-120
#modeline "1152x864" 128.42 1152 1232 1360 1568 864 865 868 910
#Gamma 1.0
EndSection

Section "Device"
Identifier "Card0"
Driver "vesa"
#Option "Coolbits" "1"
#Option "AddARGBGLXVisuals" "true"
#Option "TripleBuffer" "false"
#VendorName "nVidia Corporation"
#BoardName "G72 [GeForce 7300 SE/7200 GS]"
BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
#Viewport 0 0
#Depth 24
#Modes "1152x864"
#Virtual 3840 1200
EndSubSection
EndSection

#Section "Extensions"
# Option "Composite" "enable"
#EndSection

Regards,
Ralf

PS: If there won't be an rtirq script able to handle it or any other way
to do it, I hadn't time to test until now, I'll simply will use a kernel
<= 3.0 instead > 3.0.


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Old 05-06-2012, 01:57 PM
Ralf Mardorf
 
Default rt prio with kernel 3.x, issue to use the vesa driver

On Sun, 2012-05-06 at 15:39 +0200, Emanuel Rumpf wrote:
> a list more appropriate for this trash: linux-tuning :
> http://lists.linuxaudio.org/listinfo/

Thank you, regarding to
http://lists.linuxaudio.org/pipermail/linux-audio-tuning/2012-May/000147.html
you've got similar issues.

Since there are other issues on my AV Linux (Debian stable) install
using a 3.0, I'll use a 2.6 kernel, when I drop 3.2.0-23-lowlatency for
Precise. OTOH for a while some 3.0 or 3.x was ok on Arch, but now it's
broken too.

Anyway, perhaps somebody has got an idea:
spinymouse@oz:~$ cat /media/precise/var/log/Xorg.0.log
[snip]
[ 10.974] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 10.975] vesa: Ignoring device with a bound kernel driver
[ 10.975] (WW) Falling back to old probe method for vesa
[ 10.975] (II) UnloadModule: "vesa"
[ 10.975] (II) Unloading vesa
[ 10.975] (EE) Screen(s) found, but none have a usable configuration.
[ 10.975]
Fatal server error:
[ 10.975] no screens found
[snip]
spinymouse@oz:~$ cat /media/precise/etc/X11/xorg.conf
Section "Device"
Identifier "Configured Video Device"
Driver "vesa"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
#HorizSync 42.0 - 52.0
#VertRefresh 55.0 - 65.0
#Modeline "1024x768" 60.80 1024 1056 1128 1272 768 768 770 796
#Modeline "800x600" 38.21 800 832 976 1008 600 612 618 631
#Modeline "640x480" 24.11 640 672 760 792 480 490 495 50
#DisplaySize 305 230
HorizSync 29-98
VertRefresh 50-120
modeline "1024x768" 128.42 1152 1232 1360 1568 864 865 868 910
#Gamma 1.0
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
Subsection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubsection
EndSection

I guess that later today I'll restore the nvidia's xorg.conf and build a
non-rt preempt 3.0 and/or 2.6 with threadirqs.
Perhaps I'll keep the current kernel after installing a new kernel and
will subscribe to the tuning list.

On Debian list somebody has many issues with latest kernel, while he or
she hasn't with 2.6. I guess non-audio usage.

Regards,
Ralf


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Old 05-06-2012, 02:16 PM
Ralf Mardorf
 
Default rt prio with kernel 3.x, issue to use the vesa driver

Did for anyone using a 3.0 rt or 3.x rt work to patch the kernel or to
patch the nvidia driver to get the rt working with the nvidia driver?
Both methods didn't work for me. To ensure that a patch might be buggy,
I edited manually.

Nouveau does work too slow and too buggy on my machine. After updating X
on Arch, the nv driver that still is kept didn't work anymore.

Old installs without issues can't be used with my new card, a RME HDSPe
AIO, because I need COMPLETE ALSA ex .24 and this can become an issue.
New installs became an issue regarding to the graphics.

It might be, that a kernel full preempt with threadirqs might be ok too,
but until now I get this 3.x issues.

Perhaps I shouldn't waste other people's and my time and simply build
the last 2.6 kernel full preempt without rt.

I hope this will be solved before it becomes impossible to use 2.6
kernels for major distros.

Regards,
Ralf


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Old 05-06-2012, 02:18 PM
Ralf Mardorf
 
Default rt prio with kernel 3.x, issue to use the vesa driver

On Sun, 2012-05-06 at 16:16 +0200, Ralf Mardorf wrote:
> Did for anyone using a 3.0 rt or 3.x rt work to patch the kernel or to
> patch the nvidia driver to get the rt working with the nvidia driver?
> Both methods didn't work for me. To ensure that a patch might be buggy,
> I edited manually.

Broken English ... a buggy patch can't be the cause, since I edited
manually several times.


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