[Bug 39282] radeon HD6790 (barts) card produces black+white horizontal stripes on screen when launching Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39282

Florian Evers <florian-evers at gmx.de> changed:

           What    |Removed                     |Added
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                 CC|                            |florian-evers at gmx.de

--- Comment #15 from Florian Evers <florian-evers at gmx.de> 2011-11-18 09:20:00 PST ---
Hello,

I also have still the same problem here... but now the dmesg-crashdump is gone.
I'm using 3.2-rc2 (git-sources) now on a Gentoo amd64 system. Same result: If I
start X, I get a garbled screen. No crash visible in Xorg.0.log, only this
output in dmesg and systemlog:

[   32.343250] radeon 0000:01:00.0: GPU lockup CP stall for more than 10059msec
[   32.343253] GPU lockup (waiting for 0x00000010 last fence id 0x00000001)
[   32.344363] radeon 0000:01:00.0: GPU softreset 
[   32.344365] radeon 0000:01:00.0:   GRBM_STATUS=0xB1403828
[   32.344367] radeon 0000:01:00.0:   GRBM_STATUS_SE0=0x28000007
[   32.344369] radeon 0000:01:00.0:   GRBM_STATUS_SE1=0x28000007
[   32.344371] radeon 0000:01:00.0:   SRBM_STATUS=0x200000C0
[   32.344381] radeon 0000:01:00.0:   GRBM_SOFT_RESET=0x00007F6B
[   32.344484] radeon 0000:01:00.0:   GRBM_STATUS=0x00003828
[   32.344486] radeon 0000:01:00.0:   GRBM_STATUS_SE0=0x00000007
[   32.344488] radeon 0000:01:00.0:   GRBM_STATUS_SE1=0x00000007
[   32.344489] radeon 0000:01:00.0:   SRBM_STATUS=0x200000C0
[   32.345490] radeon 0000:01:00.0: GPU reset succeed
[   32.370151] [drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
[   32.370244] radeon 0000:01:00.0: WB enabled
[   32.386475] [drm] ring test succeeded in 3 usecs
[   32.386485] [drm] ib test succeeded in 3 usecs
[   32.646386] usb 1-1.5: unlink qh8-0e01/ffff880212383880 start 4 [1/2 us]
[   43.424562] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
[   43.424564] GPU lockup (waiting for 0x00000012 last fence id 0x00000010)
[   43.425698] radeon 0000:01:00.0: GPU softreset 
[   43.425700] radeon 0000:01:00.0:   GRBM_STATUS=0xB1403828
[   43.425703] radeon 0000:01:00.0:   GRBM_STATUS_SE0=0x28000007
[   43.425705] radeon 0000:01:00.0:   GRBM_STATUS_SE1=0x28000007
[   43.425707] radeon 0000:01:00.0:   SRBM_STATUS=0x200000C0
[   43.425731] radeon 0000:01:00.0:   GRBM_SOFT_RESET=0x00007F6B
[   43.425835] radeon 0000:01:00.0:   GRBM_STATUS=0x00003828
[   43.425837] radeon 0000:01:00.0:   GRBM_STATUS_SE0=0x00000007
[   43.425839] radeon 0000:01:00.0:   GRBM_STATUS_SE1=0x00000007
[   43.425842] radeon 0000:01:00.0:   SRBM_STATUS=0x200000C0
[   43.426842] radeon 0000:01:00.0: GPU reset succeed
[   43.451800] [drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
[   43.451891] radeon 0000:01:00.0: WB enabled
[   43.468122] [drm] ring test succeeded in 3 usecs
[   43.468132] [drm] ib test succeeded in 3 usecs

Just an idea: could this bug be related to the fact that these cards have a
stripped-down BARTS core, a BARTS-LE? Perhaps the driver tries to do some
"forbidden" things ;-)