[Bug 60879] [radeonsi] X11 can't start with acceleration enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60879

--- Comment #81 from Pali Rohár <pali.rohar at gmail.com> ---
(In reply to comment #74)
> Created attachment 98257 [details] [review]
> Fix v2
> 
> Pali, I have sent this patch to the mailing list for review, can you confirm
> that it fixes the issue for you.

Hello, I applied this patch on top of mesa, but it is not working :-( Xserver
show only black screen. And in dmesg I see this:

[   31.269778] radeon 0000:05:00.0: GPU fault detected: 147 0x09e25201
[   31.269785] radeon 0000:05:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0E6B9BCF
[   31.269788] radeon 0000:05:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x02052001
[   31.269792] VM fault (0x01, vmid 1) at page 241933263, read from CB_CMASK
(82)

In Xorg.0.log are no errors.

After killing X in dmesg are these lines:

[  307.388090] radeon 0000:05:00.0: GPU lockup CP stall for more than
276120msec
[  307.388104] radeon 0000:05:00.0: GPU lockup (waiting for 0x0000000000000002
last fence id 0x0000000000000001 on ring 0)
[  312.832194] pci_pm_runtime_suspend(): radeon_pmops_runtime_suspend+0x0/0xc0
[radeon] returns -22
[  320.270503] detected fb_set_par error, error code: -22

When I start X again, it immediately crash and in Xorg.0.log are these errors:

[   320.199] drmOpenDevice: node name is /dev/dri/card0
[   320.199] drmOpenDevice: open result is -1, (Invalid argument)
[   320.199] drmOpenByBusid: Searching for BusID pci:0000:05:00.0
[   320.199] drmOpenDevice: node name is /dev/dri/card0
[   320.199] drmOpenDevice: open result is -1, (Invalid argument)
...
[   320.270] (EE) RADEON(0): [drm] Failed to open DRM device for
pci:0000:05:00.0: No such file or directory
[   320.270] (EE) RADEON(0): Kernel modesetting setup failed
[   320.270] (II) UnloadModule: "radeon"
[   320.270] (II) Unloading radeon
[   320.270] (EE) Screen(s) found, but none have a usable configuration.
[   320.270] 
Fatal server error:
[   320.270] no screens found

Old patch (which can be applied on older mesa version) worked fine without any
problem. Note that I did not changed kernel, still using same version 3.14-rc1.

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