[Bug 87942] [NVE7] Unable to use nouveau

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=87942

--- Comment #7 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to bruno.pagani from comment #6)
> cat /proc/cmdline returns nouveau.runpm=0 correctly, but optirun glxinfo is
> still failing with the exact same error and:
> 
> [  250.843476] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x00000000
> FAULT at 0x418880 [ IBUS ]
> [  250.843564] nouveau E[   PIBUS][0000:02:00.0] GPC0: 0x419eb4 0xbadf1000
> (0x3800820c)
> [  250.843617] nouveau E[    PBUS][0000:02:00.0] MMIO write of 0x3f800000
> FAULT at 0x405804 [ IBUS ]
> [  250.843773] nouveau E[   PIBUS][0000:02:00.0] HUB0: 0x404170 0x00000012
> (0x0e008201)
> [  252.845769] nouveau E[  PGRAPH][0000:02:00.0] HUB_INIT timed out
> [  252.845777] nouveau E[  PGRAPH][0000:02:00.0] 409000 - done 0x00000204
> [  252.845787] nouveau E[  PGRAPH][0000:02:00.0] 409000 - stat 0x00000000
> 0x00000000 0x00000000 0x00000000
> [  252.845796] nouveau E[  PGRAPH][0000:02:00.0] 409000 - stat 0x00000000
> 0x00000000 0x00000002 0x00000009
> [  252.845799] nouveau E[  PGRAPH][0000:02:00.0] 502000 - done 0x00000300
> [  252.845804] nouveau E[  PGRAPH][0000:02:00.0] 502000 - stat 0x00000000
> 0x00000000 0x00000000 0x00000000
> [  252.845808] nouveau E[  PGRAPH][0000:02:00.0] 502000 - stat 0x00000000
> 0x00000000 0x00000000 0x00000000
> [  252.845810] nouveau E[  PGRAPH][0000:02:00.0] init failed, -16

This means you're not going to get acceleration no matter how hard you try to
change your config, I'm afraid. See bug 70354.

> 
> And as for what is concerning PRIME, commenting the AutoAddGPU device didn’t
> changed anything, except for Xorg.0.log reporting this obviously:
> [   136.219] (==) Automatically adding GPU devices
> 
> It think the issue is somewhere here (from the page you’ve linked):
> KMS drivers for both GPUs loaded.
> DDX drivers for both GPUs loaded.
> 
> nouveau does not load automatically at boot, I need to modprobe it manually.
> Is there a way to check or ensure nouveau KMS is loaded?

X has to start after nouveau loads, otherwise it doesn't know about the nouveau
adapter. (This may no longer be the case with DRI3-based offloading
actually...)

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