xrandr --scale XxY crashed with SIGSEGV in __libc_start_main()

[Felix Kuehling]

Binary package hint: x11-xserver-utils

I'm using Latest Jaunty as at Apr 3, 2009, 3PM. Running xrandr --scale XxY or xrandr --transform ... ends in a segfault in xrandr. The transformation is not applied.

I'm running Xorg with an empty xorg.conf on a Radeon HD 3600 using the radeon driver (/usr/lib/xorg/modules/drivers//radeon_drv.so). I've seen the same problem with a Radeon X1200 (AMD 690G) using the same driver.

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/xrandr
Package: x11-xserver-utils 7.4+1
ProcCmdline: xrandr --scale 0.5x0.5
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersion: Linux version 2.6.28-11-generic (buildd@palmer) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #39-Ubuntu SMP Thu Apr 2 03:00:35 UTC 2009
Signal: 11
SourcePackage: x11-xserver-utils
Stacktrace:
 #0 0x080498af in ?? ()
 #1 0x0804ff6a in ?? ()
 #2 0xb7d5f775 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
 #3 0x080495a1 in ?? ()
StacktraceTop:
 ?? ()
 ?? ()
 __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
 ?? ()
Title: xrandr crashed with SIGSEGV in __libc_start_main()
Uname: Linux 2.6.28-11-generic i686
UserGroups: adm admin cdrom dialout lpadmin netdev plugdev sambashare
XorgConf:
 Section "ServerFlags"
  Option "DontZap" "off"
 EndSection

[lspci]
00:00.0 Host bridge [0600]: ATI Technologies Inc RS690 Host Bridge [1002:7910]
     Subsystem: ATI Technologies Inc RS690 Host Bridge [1002:7910]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV630 [Radeon HD 2600XT] [1002:9588]
     Subsystem: ATI Technologies Inc Device [1002:2542]

[Apport retracing service (apport)]

StacktraceTop:init_transform (transform=0xac)
main (argc=3, argv=0xbfc02464) at ../xrandr/xrandr.c:2327

[Timo Aaltonen (tjaalton)]

that's because the driver only supports randr 1.2, and scale needs 1.3. Try 9.10 alpha3 livecd.

[Felix Kuehling (fxkuehl)]

xrandr --output <bla> --scale or --transform works fine with Jaunty. The segfault only happens when I omit the --output parameter. In a way it makes sense, since --scale and --transform are output-specific. Would be nice though, if xrandr could print an error message pointing out my mistake instead of just crashing.

[Bryce Harrington (bryce)]

Please check if it is still happening with Karmic, before we send it upstream. Thanks ahead of time.

[Felix Kuehling (fxkuehl)]

Still happens on Karmic with x11-xserver-utils 7.4+2. I ran xrandr --scale 1x1 which resulted in a segfault.

[Bryce Harrington (bryce)]

[This is an automatic notification.]

A new version of the -ati driver is now available in Karmic.

This is a significant update to -ati which brings in kernel mode-setting
(currently disabled) and scores of fixes for DRI2, EXA, etc.

I've posted the new version of this driver to the following PPA,
would you mind testing it and seeing if it resolves the bug you
reported?

  https://edge.launchpad.net/~bryceharrington/+archive/ppa/+sourcepub/709908/+listing-archive-extra

If you're not running this release of Ubuntu, you can try booting the Karmic
LiveCD and loading the PPA onto it, and then log out/in to restart X.
ISOs are available at http://cdimages.ubuntu.com/releases/

After testing Karmic, report back here whether it's still an issue or not,
and if it is please post a fresh Xorg.0.log and 'dmesg' output.

Note there could be new bugs... please file these as new reports using
the command 'ubuntu-bug xorg'.

[Felix Kuehling (fxkuehl)]

The problem persists with the new Radeon driver PPA. I strongly suspect that this problem is not driver-specific.

xrandr --output VGA-0 --scale 0.5x0.5 works as expected
xrandr --scale 0.5x0.5 segfaults.

It should report an error message instead of just crashing.

[Bryce Harrington (bryce)]

Created an attachment (id=29095)
0001-Check-output-pointer-validity-for-sale-and-transform.patch

Running xrandr --scale 1x1 or --transform, without specifying --output, causes crash.

Forwarding from
https://bugs.edge.launchpad.net/ubuntu/+source/xrandr/+bug/354715

[Launchpad Janitor (janitor)]

This bug was fixed in the package x11-xserver-utils - 7.4+2ubuntu2

---------------
x11-xserver-utils (7.4+2ubuntu2) karmic; urgency=low

  * 100_xrandr-output.patch: Replace with patch sent upstream.
    (LP: #354715)

 -- Bryce Harrington <email address hidden> Wed, 02 Sep 2009 02:15:48 -0700

[Julien Cristau (jcristau)]

adding qa contact.