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[Launchpad Bug Tracker <492270@xxxxxxxxxxxxxxxxxx>]

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Binary package hint: upstart

If Xorg is broken so that "upstart" tries to display a message that
Ubuntu is running in low graphics mode, then with 2.6.31-14 and
2.6.31-15 kernels it fails to determine the correct screen resolution
and the message is thus unreadable.  Tried navigating the messed-up
upstart menus to get to a console but just end up with black screens.

How to repeat this bug:

(a) break X (not sure how to do this bit) - In my case experimenting with skim/scim/ibus was enough to break hal.
       "(EE) config/hal: couldn't initialise context: unknown error (null)"

(b) reboot with a 2.6.31 kernel - every time ended up with a unreadable
message.

(c) (optional) from knowledge of upstart menus; click "ok" and the select bottom button on next (messed up) menu which should be the go to a console option.  Tab until "ok" button selected and hit return.  Result completely bank screens.
       

Expectation:  readable fall-back in the case that X fails.


If I booted with 2.6.28-16 then can read message "Ubuntu is running in low graphics mode" and can navigate to a console.

Possibly related warnings from /var/log/Xorg.failsafe.log following
messed up display:

(WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
(WW) VESA(0): Unable to estimate virtual size
(WW) VESA(0): No valid modes left. Trying less strict filter...
(WW) VESA(0): Unable to estimate virtual size
(WW) VESA(0): No valid modes left. Trying aggressive sync range...
(WW) VESA(0): Unable to estimate virtual size
(WW) xf86CloseConsole: KDSETMODE failed: Input/output error
(WW) xf86CloseConsole: VT_GETMODE failed: Input/output error
(WW) xf86OpenConsole: VT_GETSTATE failed: Input/output error
(WW) xf86CloseConsole: VT_ACTIVATE failed: Input/output error
(WW) xf86CloseConsole: VT_WAITACTIVE failed: Input/output error


also see ubuntu forums tread:
http://ubuntuforums.org/showthread.php?t=1344322


Ubuntu Release 9.10

upstart:
  Installed: 0.6.3-10
  Candidate: 0.6.3-10
  Version table:
 *** 0.6.3-10 0
        500 http://gb.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

machine: DELL XPS notebook M1210

ProblemType: Bug
Architecture: i386
Date: Fri Dec  4 11:07:47 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: openafs
Package: upstart 0.6.3-10
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-15.50-generic
SourcePackage: upstart
Uname: Linux 2.6.31-15-generic i686
XsessionErrors: (polkit-gnome-authentication-agent-1:2534): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386
-- 
upstart failsafe incorrect screen resolution when running with 2.6.31 kernerls
https://bugs.edge.launchpad.net/bugs/492270
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