The Precise Pangolin has reached end of life, so this bug will not be
fixed for that release
** Changed in: pvr-omap4 (Ubuntu Precise)
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1015292
Title:
X11 crashes with seg fault when running QT5 based applications on a
Pandaboard with the SGX driver
Status in ubuntu-omap4-extras-graphics:
New
Status in pvr-omap4 package in Ubuntu:
Invalid
Status in xf86-video-omap package in Ubuntu:
Fix Released
Status in xorg-server package in Ubuntu:
Fix Released
Status in pvr-omap4 source package in Precise:
Won't Fix
Status in xf86-video-omap source package in Precise:
Invalid
Status in xorg-server source package in Precise:
Fix Released
Status in pvr-omap4 source package in Quantal:
Invalid
Status in xf86-video-omap source package in Quantal:
Fix Released
Status in xorg-server source package in Quantal:
Fix Released
Bug description:
[Impact]
Segmentation fault at X11 where the randr code could use the randr screen
private data without checking for null first. This happens when the X server is
running with multiple screens, some of which are randr enabled and some of
which are not. Applications making protocol requests to the non-randr screens
can cause segfaults where the server touches the unset private structure.
This happened initially while running Precise on a Pandaboard, as with
the driver auto-load, it starts 2 different screens, one backed up by
the PVR SGX driver, and the other by fbdev. In this case, the issue
can easily be reproduced by running any QT5 based application, as by
default it'll try to initialize the internal structures for all
screens available at the system.
The bug can also happen on cases where the user is running one screen
with the nvidia/ati driver, and the other with fbdev (external usb
video device, for example).
[Test Case]
How to reproduce the issue, on a Pandaboard:
1) Install Precise at a Pandaboard;
2) Enable the PVR SGX driver from the "Additional Driver" screen;
1) Enable https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-daily
2) Install 'snowshoe-mobile' package
3) Run snowshoe: $ PATH=/opt/qt5/bin:$PATH; snowshoe
Broken Behavior: X11 will exit with a seg fault
Fixed Behavior: The QT5 based application (snowshoe) will open without
crashing X11.
[Regression Potential]
Both patches are already applied at upstream, and they are simply just
checking the pointers for NULL results, which would already cause a seg fault
in case of NULL value, so it's safe to be applied as SRU.
[Original Report]
While testing Qt 5 support on Ubuntu, and validating the support for
OpenGL ES2.0 with Pandaboard, I couldn't start Snowshoe (Qt 5 - webkit
based browser) as it gives a segmentation fault and also breaks the
X11 server (with the pvr driver).
After a quick check with Snowball (Mali 400), it worked properly and
as expected, so this could probably be related with the current SGX
driver available for Pandaboard.
How to reproduce the issue:
1) Enable https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-daily
2) Install 'snowshoe-mobile' package
3) Run snowshoe: $ PATH=/opt/qt5/bin:$PATH; snowshoe
This is with Ubuntu 12.04 with pvr-omap4 1.7.10.0.1.21-0ubuntu1 (from
archive) and also 1.7.15.0.1.57-1 from TI's PPA.
To manage notifications about this bug go to:
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