Red Hat Bugzilla – Bug 869617
regression: gnome-shell rendering artifacts - disappearing parts of windows
Last modified: 2014-08-04 18:09:49 EDT
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):
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
Sometimes you will see flickering
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
800x600 60.3 56.2
VGA1 connected 1920x1080+1600+0 (normal left inverted right x axis y axis) 520mm x 290mm
1600x1200 65.0 60.0
1680x1050 74.9 60.0
1400x1050 74.9 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x800 74.9 59.8
1280x768 74.9 59.9
1024x768 75.1 70.1 60.0
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
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]
Created attachment 632752 [details]
Created attachment 632753 [details]
Created attachment 632754 [details]
Created attachment 632757 [details]
I see the same with a single monitor of 1600x900 (disabled my external monitor).
I can confirm the same bug on F17 with
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