session fails to start normally in virtual session (NX)

[Eugene San]

Session fails to start normally in virtual environment as NX/VNC.
Among issues:
* Fallback check crashes preventing switching to fallback session.
   Replacing /usr/lib/nux/unity_support_test in /usr/share/gnome-session/sessions/ubuntu.session with /bin/false helps.
* Themes are not always applied (probably due to gnome-settings-daemon crash)
* unity-2d related schemes are not applied

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-session 3.2.0-0ubuntu2 [modified: usr/share/gnome-session/sessions/ubuntu.session]
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Tue Oct 4 12:05:55 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

could you get a gdb stacktrace of the unity_support_test issue?

[Sebastien Bacher (seb128)]

oh, and thank you for the bug report ;-) could you also add .xsession-errors to the bug? what do you can "scheme"?

[Eugene San (eugenesan)]

Attached xsession-errors log, for both failed (because of crashed compiz check) and more or less working sessions.
There are delimiters in file.

Regarding schemes:
gsettings-daemon patched to apply temporary gconf schemes according to session name as following /usr/share/gconf/SESSIONNAME.{mandatory,default}.path.
The problem is that when started inside NX, they are not applied for fallback and explicitly specified (--session=xxx) sessions.

[Eugene San (eugenesan)]

Regarding unity_support_test:
When running /usr/lib/nux/unity_support_test inside running NX session, it works and returns 0.
Any ideas how to simulate real conditions for it to crash?

[Didier Roche-Tolomelli (didrocks)]

@Eugene: can you please run the session and make it the unity_support_test crashes (as you only have this on log in), so that you can get the crash file in /var/crash/. Then report it with ubuntu-bug -c /var/crash/<file>.crash please?

also, report /usr/lib/nux/unity_support_test -p output

[Sebastien Bacher (seb128)]

the gnome-settings-daemon is a different one:

(gnome-settings-daemon:20586): Gdk-WARNING **: The program 'gnome-settings-daemon' received an X Window System error.
This probably reflects a bug in the program.
The error was 'XSyncBadCounter'.
  (Details: serial 195 error_code 146 request_code 137 minor_code 5)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

Could you open another bug for it?

[Eugene San (eugenesan)]

didrocks:
I am unable to reconstruct unity_support_test crash.
I suspect latest compiz update (1:0.9.6+bzr20110929-0ubuntu1 -> 1:0.9.6+bzr20110929-0ubuntu2) fixed the problem.

seb128:
I'll report separate bug for gnome-settings-daemon

[Eugene San (eugenesan)]

What about gconf schemes and and theme loading?

[Sebastien Bacher (seb128)]

could you add an updated .xsession-errors and detail the gconf and theme issue?

[Eugene San (eugenesan)]

Currently I am able to reconstruct the problem with 1.14.0-0ubuntu1.

Attached updated .xsession-errors.
Coredump is also available if required.

Workaround is replacing /usr/lib/nux/unity_support_test with link to /bin/false.

[Jay Taoko (jaytaoko)]

Is this bug still an issue and is it possible to have a stack trace of the crash?

[Omer Akram (om26er)]

Could you please follow the instructions on https://wiki.ubuntu.com/Unity/FilingBugs#Getting_a_stack_trace and attach unity.log to this bug report?

[Launchpad Janitor (janitor)]

[Expired for unity because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for nux (Ubuntu) because there has been no activity for 60 days.]