I got corruption of some font glyphs in certain applications after a resume from suspend. Also when switching between windows, some rectangular areas on the screen are incorrectly drawn. Some glyphs are consistently exchanged for other shapes, currently withing GTK applications (Eclipse, Chrome) on my KDE desktop. Context menus in GTK applications seem to hang around on screen after they are dismissed, until I force a redraw of that window. System: Thinkpad T61 Kernel: 2.6.33.3 (x86_64), KMS OS: Debian squeeze/sid xserver-xorg-core 2:1.7.7-1 xserver-xorg 1:7.5+6 xserver-xorg-video-intel 2:2.11.0-1 I have not had this problem before, and have been running this X.org version for several weeks (but have been updated the stable kernels). I had an external VGA monitor plugged in, and yesterday I pulled the VGA cable and suspeneded. The artefacts started after resume. The only difference from my regular procedure is that I usually use xrandr to disable the VGA monitor nicely.
Created attachment 35716 [details] screenshot of Chromium browser Note the lower case "l" in "hello world" is corrupted in the search field.
Created attachment 35717 [details] desktop with partially drawn windows The background windows are partially drawn. (Note that kscreenshot seems to think I have the VGA monitor still plugged, so the virtual desktop size is too big.)
Created attachment 35720 [details] screenshot of glyph corruption in Eclipse
The graphics controller is "Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)".
Hmm, the versions you have afaik are free from tiling bugs upon suspend & resume. Evidently we are not entirely bug free yet. :( Can I ask you verify your steps to reproduce this bug? In particular, what is the timing of each step. Disconnect whilst suspending, disconnect a minute before, etc? And how often do you see the corruption? You definitely exhibit corruption in the glyph cache, but I cannot explain the partial redraw.
(In reply to comment #5) > Can I ask you verify your steps to reproduce this bug? Sure, I just reproduced it on the first attempt. The steps are: 1. Work with VGA monitor connected (xrandr --output VGA1 --right-of LVDS1) 2. Pull the VGA cable. 3. After less than a minute, pull the power cable and close the lid. (Laptop usually suspend now, but it didn't, so I opened it again and pressed Fn-F4 which worked.) 4. Go home, open lid (without connecting external display). 5. kwin had turned off compositing for unknown reason (maybe because of low battery). No corruption seen at this point. 6. I re-enabled compositing with Alt-Shift-F12, and the corruption came back. As before, only Chromium, Eclipse and the plasma desktop were affected.
> 2. Pull the VGA cable. This seems to be crucial. I follow a similar procedure after every workday, except that I disable the display with xrandr before pulling the cable. The corruption appeared on exactly the two occasions when I pulled the cable first.
2.6.35-rc6 contains a couple of vital fixes for memory corruption caused by suspend+i915. Can you please try those and see if this problem still persists. Thanks.
I want to chime in here... for testing the fix (hopefully) for bug #20560 , I installed kernel 2.6.35-rc6 on my Toshiba Portégé R500 with 945GMA chip set, x86-64 install. I had noticed font corruption with intel driver 2.12.0 before (see https://bugs.freedesktop.org/attachment.cgi?id=37173), but that became less after upgrading the kernel, apparently. I do suspend to RAM a lot, actually mostly only rebooting to change kernels. Anyhow, I just observed my kind of font corruption again, with the current setup: Some glyphs get horizontal white lines (or rather, transparent lines), in this case it hit the bold "l" and "x". Not sure about reproduction procedure, but I did not connect a VGA monitor for a long time. I have seen it in browsers and a GTK mail client, probably anything that uses scalable font rendering (did not observe this in nedit, using fixed fonts). My distortion looks somewhat less severe than the others here, but perhaps it's the same issue...
Created attachment 37514 [details] Cuts in "l" and "x" on Toshiba R500, kernel 2.6.35-rc6
(In reply to comment #8) > 2.6.35-rc6 contains a couple of vital fixes for memory corruption caused by > suspend+i915. Can you please try those and see if this problem still persists. Actually I haven't been able to reproduce lately with 2.6.34 from Debian (linux-image-2.6.34-1-amd64 2.6.34-1~experimental.2). Will try a bit more. I had some problems with iwl3945 on 2.6.35, so I haven't had a chance to try it much yet.
The likely fix here is: commit 944001201ca0196bcdb088129e5866a9f379d08c Author: Dave Airlie <airlied@redhat.com> Date: Tue Jul 20 13:15:31 2010 +1000 drm/i915: enable low power render writes on GEN3 hardware. A lot of 945GMs have had stability issues for a long time, this manifested a one such report is at: https://bugs.freedesktop.org/show_bug.cgi?id=20560 along with numerous distro bugzillas. This only took a week of digging and hair ripping to figure out. Tracked down and tested on a 945GM Lenovo T60, previously running x11perf -copypixwin500 or x11perf -copywinpix500 repeatedly would cause the GPU to wedge within 4 or 5 tries, with random bus After this patch no hangs were observed. in conjunction with memory corruption fixes.
I still see the font corruption (horizontal transparent lines) after resume from hibernate. chipset: 945GM kernel: 2.6.36 os: debian sid/experimental 32bit xserver: 1.9.2 xf86-video-intel: 2.13.901
I have such bug too. /etc/X11/xorg.conf in Section "Device" added: /*********************************/ Option "DRI" "true" Option "FallbackDebug" "true" Option "DebugFlushBatches" "true" Option "DebugFlushCaches" "true" /*********************************/ In /var/log/Xorg.0.log sometimes catch this information /*********************************/ [ 31.398] UXA fallback at uxa_check_composite: from picts 0x9e74598/(nil) to pict 0x9e74670 [ 31.398] (II) intel(0): fallback: (II) Unsupported picture format 0x1011000 [ 31.398] (II) intel(0): fallback: (II) Unsupported picture format 0x1011000 [ 31.398] (II) intel(0): fallback: (II) Unsupported picture format 0x1011000 [ 31.398] (II) intel(0): fallback: (II) Unsupported picture format 0x1011000 [ 31.399] Composite fallback at uxa_composite: op Src, src 0x9e420d8:m fmt A8 (17x16), mask None, dst 0x9e747c0:m fmt A8 (17x16), screen normal [ 31.399] UXA fallback at uxa_check_composite: from picts 0x9e74768/(nil) to pict 0x9e74950 [ 31.399] Composite fallback at uxa_composite: op Src, src 0x9e420d8:m fmt A8 (16x12), mask None, dst 0x9e749b8:m fmt A8 (16x12), screen normal /*********************************/ lspci -vvv /*********************************/ 00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 817a Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 16 Region 0: Memory at efe00000 (32-bit, non-prefetchable) [size=512K] Region 1: I/O ports at b800 [size=8] Region 2: Memory at d0000000 (32-bit, prefetchable) [size=256M] Region 3: Memory at efe80000 (32-bit, non-prefetchable) [size=256K] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel driver in use: i915 Kernel modules: i915 /*********************************/ My configuration -- chipset: 945G -- system architecture: 32-bit -- xf86-video-intel: 2.13.902+git20101223 -- xserver: 1.9.0 -- libdrm: 2.4.23 -- kernel: 2.6.35-22-generic-pae -- Linux distribution: Ubuntu 10.10
Have also a similar problem for already nearly a year. That has been also reported on Archlinux bug tracker and should be marked upstream: https://bugs.archlinux.org/task/20603 My current hardware/software: Thinkpad x41t with VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03) xorg-server 1.10.1 xorg-utils 7.6 kernel 2.6.38 As mentioned on Archlinux tracker, the problem of broken fonts occures randomly and is temporary fixable by increasing/decreasing font size. Please tell, if more information is needed.
The incorrect rendering of rectangular regions sounds reminiscent of commit 0e2fbb6a1c1ad6b0971d07a91a790b0b3236dad3 Merge: 64ccc66 84d7a82 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Thu Mar 15 12:43:47 2012 +0000 uxa: Merge 'remove complicated second level caching' Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47345 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> However the font corruption still remains a misery of UXA.
I'm going to mark this as resolved, believing the rectangular corruption is fixed and tracking the font corruption in other bugs. Thanks for the report.
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