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Xorg nouveau: works but with terrible flickering
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kennethB
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Joined: 06 Jan 2015
Posts: 5

PostPosted: Fri Jan 09, 2015 10:50 am    Post subject: Xorg nouveau: works but with terrible flickering Reply with quote

Hello all, I'm having a strange problem when trying to use nouveau drivers for my NVidia card.

First of all, after enabling the nouveau support in the kernel I started getting the "waiting for uevents to be processed" behavior (https://forums.gentoo.org/viewtopic-t-955618-highlight-waiting+uevents+processed.html). Escaping out of it with Ctrl-C, I startx, but get a flickering screen. The X server is working and displaying keyboard actions but the flickering slows things down greatly. The Xorg logs do not contain error lines, but the lines

Quote:
[ 344.789] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 344.840] removing GPU device /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card1 /dev/dri/card1
[ 344.889] removing GPU device /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card1 /dev/dri/card1


are spawned over and over again. So it's constantly adding and removing a nonexistent GPU device. Could someone tell me how to stop that?

Here's my xorg.conf.d/10-main.conf:

Code:
Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
   # ModulePath     "/usr/lib/xorg/modules/extensions/nvidia"
   # ModulePath     "/usr/lib/xorg/modules"
    FontPath       "catalogue:/etc/X11/fontpath.d"
    FontPath       "built-ins"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/input/mice"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Samsung"
    ModelName      "CRT-1"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
    Option         "PreferredMode" "1024x768"
EndSection

Section "Device"
    Identifier     "Device0"
    Option         "UseEDID" "false"
    Option         "VGA-0" "Monitor0"
    Driver         "nouveau"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 630"
   
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-1"
    Option         "metamodes" "1024x768 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "DRI"
    Group          0
    Mode           0666
EndSection


Thank you!
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Jaglover
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Joined: 29 May 2005
Posts: 6958
Location: Saint Amant, Acadiana

PostPosted: Fri Jan 09, 2015 12:56 pm    Post subject: Reply with quote

You do not need xorg.conf, try without it.
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kennethB
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Joined: 06 Jan 2015
Posts: 5

PostPosted: Fri Jan 09, 2015 3:50 pm    Post subject: Reply with quote

Jaglover,
that didn't help. It's still flickering.
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chithanh
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Joined: 05 Aug 2006
Posts: 2152
Location: Berlin, Germany

PostPosted: Fri Jan 09, 2015 4:45 pm    Post subject: Reply with quote

Do you have several graphics chips connected to your system? What does "lspci -k" say?
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Randy Andy
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Joined: 19 Jun 2007
Posts: 1136
Location: /dev/koelsch

PostPosted: Fri Jan 09, 2015 5:39 pm    Post subject: Reply with quote

Through out keyboard and mouse and insert evdev in this line

Code:
INPUT_DEVICES="evdev"


of your make.conf, if you haven't already.
For this case, recompile your world with -DuvaN options.

Just a shot in the dark, cause the syntax of your xorg.conf.d/10-main.conf

Much success, Andy.
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omghaxzs
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Joined: 04 Mar 2015
Posts: 1

PostPosted: Wed Mar 04, 2015 6:40 am    Post subject: Reply with quote

Not sure if you're still running into this issue, but this may help the next person looking for info on this error.

I ran into this when I was trying to have nouveau and nvidia proprietary coexist but use nouveau exclusively (compiled nouveau as a module and prevented nvidia from being loaded via /etc/modules.d or /etc/modules-load.d)
Everything ran cool with Xorg but I was seeing that "removing GPU device error" along with a lot of fuss coming from journalctl and syslog about the nvidia module trying to load while nouveau had already registered the card.

What I observed was Xorg listening to udev constantly add and remove the nvidia GPU, this was confirmed by the spam coming from 'udevadm monitor.'
Later I learned that the nvidia-drivers package installs a udev rule in /lib/udev/rules.d/99-nvidia.rules that was causing this constant add/removal in udev.

Commenting out the rules in that file stopped the spam and Xorg mesasges for me. When I want to use nvidia I'll probably add those back.

With that said, I don't know what the context of your install is like (all I know is you're trying to use nouveau) but I was experiencing this issue and that was how I solved it.
Hope this provides some help to some without having to dig like I did (although you should, its good for you :D )

-omghaxzs
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