Ok, it looks like if I close the lid, Ubuntu behaves as if the Fn-F8
(CRT/LCD) button is being pressed: It goes from internal only to
external only, from external only to extended desktop, from extended
desktop to clone, and from clone to internal only back again.
However, this behaviour is not appropriate for closing the lid.
Side note: I can recover from the situation not only from reconfiguring
my display setup but also by pressing Fn-F8 several times.
** Summary changed:
- [i915] dualscreen: video config is destroyed by suspending via lid (KMS)
+ [i915] dualscreen: video config is destroyed by acpid (videobtn.sh) when
suspending via lid
** Description changed:
Binary package hint: xserver-xorg-video-intel
On Karmic latest KMS (and Jaunty Non-KMS) on a Dell Latitude X1
(i915GMS), with an externally connected Dell 2405, suspending by closing
the lid destroys the video configuration. Briefly before going to
standby, the displays switch to mirrored mode and a low resolution.
After waking up, the configuration has to be manually restored via
- xrandr or Display Properties.
+ xrandr or Display Properties or by pressing Fn-F8 (CRT/LCD) several
+ times.
- - Suspending via FUSA or pm-suspend instead works as expected.
+ Suspending via FUSA or pm-suspend instead works as expected.
This is a regression from Intrepid and Hardy.
ANALYSIS OF THE PROBLEM:
- - destroying the display config happens somewhere within acpid, because the
issue is not present when I shutdown acpid
- - I currently do not know how to debug further
+ - destroying the display config happens in the /etc/acpi/videobtn.sh
+ script, invoked by acpid when the lid is closed
+
[lspci]
00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express
Processor to DRAM Controller (rev 03)
Subsystem: Dell Device 01a3
00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML
Express Graphics Controller (rev 03)
Subsystem: Dell Device 01a3
** Attachment removed: "upper screen shows badly maximized window, lower screen
shows badly positioned panels"
http://launchpadlibrarian.net/24809983/Screenshot.png
--
[i915] dualscreen: video config is destroyed by acpid (videobtn.sh) when
suspending via lid
https://bugs.launchpad.net/bugs/352708
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