Le 14/01/2021 à 19:15, Emil Velikov a écrit :
On Wed, 13 Jan 2021 at 16:52, Archange <archange@xxxxxxxxxxxxx> wrote:
Le 12/01/2021 à 21:45, Emil Velikov a écrit :
On Tue, 12 Jan 2021 at 18:24, Archange <archange@xxxxxxxxxxxxx> wrote:
OK, will try to check tomorrow with a friend that has an Optimus laptop.
Perfect, thanks in advance.
To trigger the event one has to echo into a sysfs file... Don't recall
exactly, some of the following should be it.
a) If the nvidia module is driving an fbcon:
- echo "0" > /sys/class/vtconsole/vtconX/bind
b) and/or a combination of the following
- echo "remove" (or was it "unbind") > /sys/class/drm/cardX/device/uevent
- echo "remove" (or was it "unbind") >
/sys/class/drm/cardX/device/driver/uevent
- echo "1" > /sys/class/drm/cardX/device/driver/unbind
2) If the driver is loaded before X, it works for PRIME. However, the
card refuse to unbind because it’s in use by X even if nothing is
actually running on it.
It just works here so I suspect that a command or the order was off.
My setup:
- Intel/Nvidia system, monitor plugged/powered by Intel GPU
- Therefore fb0 is for Intel (alongside card0) and Nvidia does not
have fb device only card1.
Same on the laptop of my friend.
What I've done:
- Toggle render offload ON via xrandr, try glxgears
- Toggle render offload OFF via xrandr
Not sure how I’m supposed to do that, didn’t find any reference online.
- Issue the removal - echo "remove" > /sys/class/drm/card1/uevent
This segfaults Xorg right away.
- Confirm that it works - Xorg.0.log should list "removing GPU device
...blabla/card1"
It does appear, with the segfault:
[117777.574] (II) config/udev: removing GPU device
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card1 /dev/dri/card1
[117777.575] xf86: remove device 0
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card1
[117777.593] (II) UnloadModule: "nvidia"
[117777.593] (II) UnloadSubModule: "glxserver_nvidia"
[117777.593] (II) Unloading glxserver_nvidia
[117777.593] (II) UnloadSubModule: "wfb"
[117777.593] (II) UnloadSubModule: "fb"
[117777.594] (EE)
[117777.594] (EE) Backtrace:
[117777.594] (EE) 0: /usr/lib/Xorg (xorg_backtrace+0x53) [0x55efd7ad1f63]
[117777.594] (EE) 1: /usr/lib/Xorg (0x55efd798b000+0x151da5)
[0x55efd7adcda5]
[117777.594] (EE) 2: /usr/lib/libc.so.6 (0x7f105e9f1000+0x3d6a0)
[0x7f105ea2e6a0]
[117777.595] (EE) 3: /usr/lib/Xorg (RRTellChanged+0x969) [0x55efd7a3e3d9]
[117777.595] (EE) 4: /usr/lib/Xorg (0x55efd798b000+0x1bb9d4)
[0x55efd7b469d4]
[117777.595] (EE) 5: /usr/lib/Xorg (0x55efd798b000+0x1bbb28)
[0x55efd7b46b28]
[117777.595] (EE) 6: /usr/lib/Xorg (0x55efd798b000+0x14a331)
[0x55efd7ad5331]
[117777.595] (EE) 7: /usr/lib/Xorg (WaitForSomething+0x250)
[0x55efd7ad0c00]
[117777.595] (EE) 8: /usr/lib/Xorg (0x55efd798b000+0x39914)
[0x55efd79c4914]
[117777.595] (EE) 9: /usr/lib/libc.so.6 (__libc_start_main+0xf2)
[0x7f105ea19152]
[117777.595] (EE) 10: /usr/lib/Xorg (_start+0x2e) [0x55efd79c55de]
[117777.595] (EE)
[117777.595] (EE) Segmentation fault at address 0x34
[117777.595] (EE)
Fatal server error:
[117777.595] (EE) Caught signal 11 (Segmentation fault). Server aborting
[117777.595] (EE)
[117777.595] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[117777.595] (EE) Please also check the log file at
"/var/log/Xorg.0.log" for additional information.
[117777.595] (EE)
[117777.595] (II) AIGLX: Suspending AIGLX clients for VT switch
[117777.682] (EE) Server terminated with error (1). Closing log file
Maybe I missed a fb? Not sure…
I might try again tomorrow but really not sure, I have a plane to catch
and my friend might not be available early enough.
Regards,
Bruno
