Bug 37159

Summary:

segfault in shadowUpdatePacked triggered by "Virtual 3200 1200"

Product:

xorg

Reporter:

Jonathan Nieder <jrnieder>

Component:

Driver/fbdev

Assignee:

Xorg Project Team <xorg-team>

Status:

RESOLVED MOVED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

major

Priority:

medium

Version:

unspecified

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

URL:

http://bugs.debian.org/625521

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
X server log exhibiting crash	none
"fbset -i" output	none
xorg.conf that triggered it	none
full backtrace	none
valgrind output	none

Description Jonathan Nieder 2011-05-12 20:46:03 UTC

Created attachment 46658 [details]
X server log exhibiting crash

Steve M. Robbins <steve@sumost.ca> noticed that uninstalling the ati driver on his system caused X to crash at startup.  It turned out to be a misconfiguration --- since the right driver to use (radeon) was not autodetected, X used the fbdev driver. The fbdev driver is not supposed to make Xorg crash, though, hence this report.

The good news:

> I can confirm that *without* xserver-xorg-video-ati installed:
>
> 1. If I comment out the virtual directive, there is no crash.
> 2. If I remove xorg.conf completely, there is no crash.
>
> There is still a bunch of diagnostics in the log file:
>
> [255110.061] (==) Depth 24 pixmap format is 32 bpp
> [255110.264] (==) FBDEV(0): Backing store disabled
> [255110.264] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
> [255110.264] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
> [255110.264] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
>
> Once I install xserver-xorg-video-ati, I can remove xorg.conf and it
> runs using the RADEON driver.

Original report is at http://bugs.debian.org/625521

Xorg.0.log attached.  Will attach more info in followup.

Comment 1 Jonathan Nieder 2011-05-12 20:46:48 UTC

Created attachment 46659 [details]
"fbset -i" output

Comment 2 Jonathan Nieder 2011-05-12 20:47:34 UTC

Created attachment 46660 [details]
xorg.conf that triggered it

Comment 3 Jonathan Nieder 2011-05-12 20:48:04 UTC

Created attachment 46661 [details]
full backtrace

Comment 4 Jonathan Nieder 2011-05-12 20:48:23 UTC

Created attachment 46662 [details]
valgrind output

Comment 5 GitLab Migration User 2018-08-10 20:41:35 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/driver/xf86-video-fbdev/issues/2.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.