jockey-gtk crashed with AttributeError: 'Backend' object has no attribute '_f_result' while trying to install fglrx driver

[Jacob Hayn]

Binary package hint: jockey-gtk

On a Hardy box the fglrx driver was installed and worked fine. I've upgraded from Hardy to the Intrepid Beta (with update-manager -d). After the upgrade the fgrlx driver was'nt installed anymore. Then i tried to reinstall it with 'System' -> 'Systemverwaltung' -> 'Hardware-Treiber' (sorry, that's german, but i checked the menu with 'alacarte' - it is jockey-gtk). That failed, so i ran it in a terminal and it chrashed again with the following output:

~$ jockey-gtk
Traceback (most recent call last):
  File "/usr/bin/jockey-gtk", line 344, in on_button_toggle_clicked
    'toggle', False):
  File "/usr/lib/python2.5/site-packages/jockey/ui.py", line 571, in set_handler_enable
    handler_id, enable)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 116, in polkit_auth_wrapper
    return fn(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 87, in dbus_sync_call_signal_wrapper
    raise _h_exception_exc
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.AttributeError: Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/dbus/service.py", line 696, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 326, in set_enabled
    return self._f_result
AttributeError: 'Backend' object has no attribute '_f_result'

~$ lsb_release -rd
Description: Ubuntu intrepid (development branch)
Release: 8.10

~$ apt-cache policy jockey-gtk
jockey-gtk:
  Installiert: 0.5~beta1-0ubuntu2
  Kandidat: 0.5~beta1-0ubuntu2
  Versions-Tabelle:
 *** 0.5~beta1-0ubuntu2 0
        500 http://de.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

I found only one result on google for '_f_result jockey-gtk', an italian ubuntu forum. That doesn't helped much because i don't understand italian.

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 8.10
ExecutablePath: /usr/bin/jockey-gtk
InterpreterPath: /usr/bin/python2.5
NonfreeKernelModules: fglrx
Package: jockey-gtk 0.5~beta1-0ubuntu2
PackageArchitecture: all
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/bin/jockey-gtk
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/jockey-gtk']
SourcePackage: jockey
Title: jockey-gtk crashed with AttributeError in set_enabled()
Uname: Linux 2.6.27-4-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev sambashare vboxusers video www-data

[Alberto Milone (albertomilone)]

The proprietary fglrx video driver available in Ubuntu 8.04 LTS and earlier releases is not compatible with the X.Org included in Ubuntu 8.10. For further information, please read this:
https://wiki.ubuntu.com/IntrepidReleaseNotes#ATI%20video%20support

And here's the bug report filed against the fglrx driver:
https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/247376

As regards the crash of Jockey, it might depend on the fact that python-apt failed to install the package since it provides "xserver-xorg-video-2" which conflicts with the current Xorg ABI (and this conflict is ok).

[Martin Pitt (pitti)]

Note to self: might happen if _f_result_wrapper() exits with an exception.

[Martin Pitt (pitti)]

Right, I reproduced the bug. Fixing...

[Martin Pitt (pitti)]

I fixed trunk to propagate the actual error from the driver, instead of that "_f_result" stuff. This change will then cause a different exception to be raised (reporting that through the standard crash handler is appreciated!).

[Launchpad Janitor (janitor)]

This bug was fixed in the package jockey - 0.5~beta1-0ubuntu3

---------------
jockey (0.5~beta1-0ubuntu3) intrepid; urgency=low

  * Merge bug fixes from trunk:
     - Update the name of fglrx; radeonhd etc. are accelerated, too.
       (LP: #263359)
     - ui.py, backend(): Re-detect device drivers after the backend timed out.
       (LP: #273231)
     - backend.py, set_enabled(): Propagate exceptions from the enable/disable
       threads. (LP: #278034)
     - jockey-{gtk,kde}: Fix display of UI elements if no drivers are
       available. (LP: #277616, #277702)
     - jockey-kde: Actually show a license dialog when clicking on "Details"
       for the license. [Alberto]
     - Fix enabling/disabling of video drivers if multiple cards are
       configured in xorg.conf. [Alberto]
     - detection.py, get_printers(): Intercept RuntimeError harder.
       (LP: #272721)

 -- Martin Pitt <email address hidden> Mon, 06 Oct 2008 13:34:12 +0200

[Lorenz (lorenzloidl)]

Amazingly quick fix! Will test tonight :)