X crashes returning one to the gdm login screen

[jcdutton]

When running the application. nxclient. X crashes and returns to the gdm login screen.

[jcdutton (james-superbug)]

Description: Ubuntu lucid (development branch)
Release: 10.04

Same problem was present in karmic.

[jcdutton (james-superbug)]

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x28) [0x4a2648]
1: /usr/bin/X (0x400000+0x6538d) [0x46538d]
2: /lib/libpthread.so.0 (0x7fc18e9f6000+0xf8f0) [0x7fc18ea058f0]
3: /lib/libc.so.6 (memcpy+0xe1) [0x7fc18d756d11]
4: /usr/lib/libpixman-1.so.0 (0x7fc18e35b000+0x3419e) [0x7fc18e38f19e]
5: /usr/lib/libpixman-1.so.0 (0x7fc18e35b000+0x2efdd) [0x7fc18e389fdd]
6: /usr/lib/libpixman-1.so.0 (0x7fc18e35b000+0x36cc2) [0x7fc18e391cc2]
7: /usr/lib/libpixman-1.so.0 (0x7fc18e35b000+0x38030) [0x7fc18e393030]
8: /usr/lib/libpixman-1.so.0 (0x7fc18e35b000+0x2ec6a) [0x7fc18e389c6a]
9: /usr/lib/libpixman-1.so.0 (pixman_image_composite+0x17c) [0x7fc18e38aacc]
10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fc18b906000+0x24ef5) [0x7fc18b92aef5]
11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fc18b906000+0x3a77b) [0x7fc18b94077b]
12: /usr/bin/X (0x400000+0xd9a2c) [0x4d9a2c]
13: /usr/bin/X (0x400000+0xb1b4f) [0x4b1b4f]
14: /usr/bin/X (0x400000+0xb2b4d) [0x4b2b4d]
15: /usr/bin/X (0x400000+0x30bcc) [0x430bcc]
16: /usr/bin/X (0x400000+0x2613a) [0x42613a]
17: /lib/libc.so.6 (__libc_start_main+0xfd) [0x7fc18d6eec4d]
18: /usr/bin/X (0x400000+0x25ce9) [0x425ce9]
Segmentation fault at address 0x7fc18842d000

Caught signal 11 (Segmentation fault). Server aborting

[jcdutton (james-superbug)]

This is reproducible 100%, on demand.

[Monkey (monkey-libre)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in xorg.
For future reference you might be interested to know that a lot of applications have bug reporting functionality built in to them. This can be accessed via the Report a Problem option in the Help menu for the application with which you are having an issue. You can learn more about this feature at https://wiki.ubuntu.com/ReportingBugs.

[jcdutton (james-superbug)]

After an update:
 (II) Module intel: vendor="X.Org Foundation"
- compiled for 1.7.5.902, module version = 2.10.902
+ compiled for 1.7.6, module version = 2.10.903
        Module class: X.Org Video Driver
        ABI class: X.Org Video Driver, version 6.0

It does not crash back to the gdm login screen any more.
A more minor problem remains. When using nxclient, it is not possible to switch applications.
I.e. I cannot switch between the nxclient window and any other window. I.e. switch from the nxclient remote session and a local session of firefox. One has to exit nxclient before one can do other tasks.
Normally, I would expect the nxclient window to just be another application window with one being able to minimise nxclient and use firefox instead.

[Robert Hooker (sarvatt)]

Unfortunately without any logs we can't dig into it much deeper, and from what you have posted I can see you are using xorg-edgers which is prone to breakage given the daily updates. If possible, can you please install ppa-purge from there, then use ppa-purge to remove all xorg-edgers packages, reboot, then ensure you can reproduce this problem. If you can reproduce, please run apport-collect 547175 to attach the logs we will need automatically.

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi jcdutton,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect 547175

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug 547175 in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/547175

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.