Bug 27784

Summary: UMS broken with recent kernels and Mesa on rv280
Product: Mesa Reporter: Andrew Randrianasulu <randrik>
Component: Drivers/DRI/r200Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: git   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments: X log
xorg.conf
dmesg
dmesg
lspci -vvvn

Description Andrew Randrianasulu 2010-04-21 20:13:13 UTC 
For some reason i got only black window instead of nice gears.

It works with KMS.

Kernel: drm-radeon-testing up to

commit 10fd883ce384706f88554a0b08cc4d63345e7d8b
Author: Dave Airlie <airlied@redhat.com>
Date:   Tue Apr 20 16:34:20 2010 +1000
    agp/intel: put back check that we have a driver for the bridge.

libdrm:

commit 894c86e8400f13f1ee0dfe23ca4b5f98c32d9223
Author: Kristian Høgsberg <krh@bitplanet.net>
Date:   Fri Apr 9 16:33:38 2010 -0400
    Revert "Fix pkgconfig includes for /usr/include/drm"

xf86-video-ati:

commit 2a6b409496f26da0436972b5feae6ea035dde08d
Author: Owain Ainsworth <zerooa@googlemail.com>
Date:   Mon Apr 19 14:37:33 2010 +0100
    Reference count shared driver mappings.

mesa:

commit 9e258fc2bd6f2b9950606a0a92bb92c8959d9efd
Author: Vinson Lee <vlee@vmware.com>
Date:   Tue Apr 20 18:48:04 2010 -0700
    gallivm: Remove unnecessary headers.

xserver:

commit 35d208125fa0ec78e8d694adc52886b977e789cf
Author: Tiago Vignatti <tiago.vignatti@nokia.com>
Date:   Wed Apr 21 18:28:13 2010 +0300
    xfree86: fix not reached code in fi1236 driver from i2c

libpciacces:

commit af2be74979aeab9a2fc4c933462e97ce70f816b6
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Tue Jan 19 18:37:43 2010 +0100
    libpciaccess x86 backend

logs will follow .....
Comment 1 Andrew Randrianasulu 2010-04-21 20:14:01 UTC 
Created attachment 35227 [details]
X log
Comment 2 Andrew Randrianasulu 2010-04-21 20:16:46 UTC 
Created attachment 35228 [details]
xorg.conf

Playing with colorTiling was unhelpful. Playing with resolution changes nothing. It simply doesn't work if i set DefaultDepth to 16 (for UMS). Disabling PAT support via nopat kernel option changes nothing.
Comment 3 Andrew Randrianasulu 2010-04-21 20:17:26 UTC 
Created attachment 35229 [details]
dmesg
Comment 4 Andrew Randrianasulu 2010-04-21 20:22:29 UTC 
Glxgears in UMS was working (with same userspace) up to kernel 

commit 6d6b89bd2e316b78d668f761d380837b81fa71ef
Merge: 13dda80 2507c05
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Tue Mar 2 07:55:08 2010 -0800

in mainline. I halted git-bisect because original good/bad pair was not about this bug, i wrongly assumed new kernel was unable to "fix"  bug 22576. 

I can re-run git-bisect, but it will take time ... anyone want to beat me on this?
Comment 5 Andrew Randrianasulu 2010-04-21 20:26:32 UTC 
Created attachment 35230 [details]
dmesg

Sorry, original dmesg was splitted by syslog, it seems. Here is more complete version.
Comment 6 Andrew Randrianasulu 2010-04-21 20:29:22 UTC 
MTRR (under X):

guest@slax:~$ cat /proc/mtrr 
reg00: base=0x000000000 (    0MB), size=  512MB, count=1: write-back
reg01: base=0x0d0000000 ( 3328MB), size=  128MB, count=1: write-combining
reg05: base=0x0e0000000 ( 3584MB), size=  128MB, count=2: write-combining
Comment 7 Andrew Randrianasulu 2010-04-21 20:30:47 UTC 
Created attachment 35231 [details]
lspci -vvvn
Comment 8 Andrew Randrianasulu 2010-05-13 11:09:02 UTC 
According to http://article.gmane.org/gmane.comp.video.dri.devel/46026 ("Regression: commit 566d84d1 breaks glxgears on r200") it was commit 566d84d172161cb6c0c4dd834c34abbac6bf7b38 (drm/radeon:
r100/r200 ums: block ability for userspace app to trash 0 page and
beyond) .....
Comment 9 Andrew Randrianasulu 2010-05-31 12:14:05 UTC 
At least glxgears back to normal with 2.6.35-rc1 mainline kernel ....

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