Created attachment 632750 [details] first image - change rapidly between consecutive images to see the artifacts Description of problem: I apologize for the vague description, I hope the attached screenshots can help pinpoint my problem. I am seeing this mainly with firefox, but also with other apps (I think gnome-terminal as well). It appears intermittently: after a change of a page some parts of the window will be invisible, or filled with black (as though the font was totally white with alpha of 1, or totally black - maybe this is a font is sue). forcing a rerendering (maximize, change size, reload) solves this immediately or eventually. Sometimes it appears as flickering - like just writing this bug report, the last sentence will disappear and reappear. Version-Release number of selected component (if applicable): gnome-shell-3.6.1-3.fc18.x86_64 xorg-x11-drv-intel-2.20.10-2.fc18.x86_64 mesa-dri-drivers-9.0-1.fc18.x86_64 How reproducible: It happens all the time but I don't have a recipe. This seems to work not bad: Steps to Reproduce: 1. open a text box in firefox 2. type text 3. Actual results: Sometimes you will see flickering Expected results: No flickering Additional info: I am using two monitors, builtin lcd panel of my T510 laptop and an external VGA connected LCD. xrandr: Screen 0: minimum 320 x 200, current 3520 x 1080, maximum 8192 x 8192 LVDS1 connected 1600x900+0+180 (normal left inverted right x axis y axis) 344mm x 193mm 1600x900 60.2*+ 50.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 connected 1920x1080+1600+0 (normal left inverted right x axis y axis) 520mm x 290mm 1920x1080 60.0*+ 1600x1200 65.0 60.0 1680x1050 74.9 60.0 1680x945 60.0 1400x1050 74.9 60.0 1600x900 60.0 1280x1024 75.0 60.0 1440x900 75.0 59.9 1280x960 60.0 1366x768 60.0 1360x768 60.0 1280x800 74.9 59.8 1152x864 75.0 1280x768 74.9 59.9 1024x768 75.1 70.1 60.0 1024x576 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 848x480 60.0 640x480 72.8 75.0 66.7 60.0 720x400 70.1 HDMI1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) HDMI3 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) DP3 disconnected (normal left inverted right x axis y axis) (perhaps it wouldn't happen with lower resolutions, some sort of texture memory exhaustion?) Nothing unusual in /var/log/messages Nothing unusual in /var/log/Xorg.0.log Nothing unusual in ~/.xsession-errors Moving the mouse over the window also may cause it to update and either become wrongly rendered or correctly rendered. Show I'm using intel driver: $ sudo cat /proc/`pgrep Xorg`/maps | grep intel | tail -1 7ffe0c82f000-7ffe0c831000 rw-p 0010e000 08:04 82815894 /usr/lib64/xorg/modules/drivers/intel_drv.so
Created attachment 632751 [details] second image
Created attachment 632752 [details] third image
Created attachment 632753 [details] fourth image
Created attachment 632754 [details] fifth image
Created attachment 632757 [details] sixth image
I see the same with a single monitor of 1600x900 (disabled my external monitor).
I can confirm the same bug on F17 with gnome-shell-3.4.1-6.fc17.x86_64 xorg-x11-drv-intel-2.20.8-1.fc17.x86_64 mesa-dri-drivers-8.0.4-1.fc17.x86_64
This message is a reminder that Fedora 18 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 18. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '18'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 18's end of life. Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 18 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior to Fedora 18's end of life. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.