ubuntu-x-swat team mailing list archive

[Bryce Harrington <753971@xxxxxxxxxxxxxxxxxx>]

Thanks, here's diagnostics that would be helpful:

a.  For all systems (both working and non-working) please tabulate the
following:

  * Does it exhibit the issue, or no
  * What is the PCI ID of the graphics card.  I.e.:   output of ` lspci -vvnn | grep 'VGA ' `
  * What video driver is in use.  (Look in /var/log/Xorg.0.log, it'll be like "...(II) RADEON(0)...", etc.

b.  On one of the affected systems, test whether the issue can be
reproduced in Classic Desktop (no effects).  Like Brian indicated,
compiz has its own logic for supporting multihead and
resolution/rotation changes, and can exhibit bugs particular to it that
don't affect X in general outside compiz.

c.  On one of the affected systems, do the same test but instead of
using the gnome-display-properties applet, use the xrandr command line
tool.  See man xrandr for some examples of how this tool is used.  If
the issue can be reproduced using xrandr it rules out the possibility of
the bug being in gnome-display-properties.

d.  Please tell me when you first started noticing this behavior.  Had
you been running this same test previously without this failure, or have
the systems been doing this as long as you've been running the test?
Knowing this can help in pinpointing when the regression was introduced.

Fwiw, I tested on my own dell mini 10v (both with and without Unity;
last updated last week) but did not reproduce the bug.

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https://bugs.launchpad.net/bugs/753971

Title:
  Display garbled upon restoring original resolution or connecting
  external displays