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[Bug 711854] New: Garbled screen on external display if booted with laptop lid closed
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Thu, 11 Aug 2011 19:31:32 +0000
  • Message-id: <bug-711854-21960@http.bugzilla.novell.com/>

https://bugzilla.novell.com/show_bug.cgi?id=711854

https://bugzilla.novell.com/show_bug.cgi?id=711854#c0


Summary: Garbled screen on external display if booted with
laptop lid closed
Classification: openSUSE
Product: openSUSE 11.4
Version: Final
Platform: x86
OS/Version: openSUSE 11.4
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
AssignedTo: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: jaanvajakas@xxxxxx
QAContact: qa@xxxxxxx
Found By: ---
Blocker: ---


Created an attachment (id=445457)
--> (http://bugzilla.novell.com/attachment.cgi?id=445457)
Output of "sudo /usr/sbin/hwinfo --gfxcard"

User-Agent: Mozilla/5.0 (X11; U; Linux i686; et-EE) AppleWebKit/533.3
(KHTML, like Gecko) konqueror/4.6.0 Safari/533.3

The latest kernel's i915 display driver has serious problems on my DELL
Latitude E6410 laptop when the laptop is started with lid closed and an
external display attached.

Reproducible: Always

Steps to Reproduce:
1. Install kernel-default 3.0.1-1.1-i586, kernel-default-base 3.0.1-1.1-i586
and preload-kmp-default 1.2_k3.0.1_1-76.39-i586 from the repository
http://download.opensuse.org/repositories/Kernel:/stable/standard/.
2. Shut down the laptop.
3. Dock the laptop, attach external digital LCD monitor to the dock's DVI port
and close the laptop lid.
4. Power on the laptop and wait until GRUB boots openSUSE 11.4.

Actual Results:
For a second, I can see the openSUSE logo. After that, the screen becomes black
with flickering pixels in two vertical lines near the left edge of the screen
and a short horizontal line in the top left corner. Finally, a picture of 104
or 105 evenly-spaced light greenish-blue stripes on a darker green background
appears. However, the mouse cursor is rendered correctly and I can move it
around the screen. By pressing the buttons on the external monitor's case I can
see from the monitor's menu that the display resolution is 1680x1050, which is
the native resolution of my external monitor. The laptop's built-in display is
turned off all the time.

Expected Results:
Instead of flickering pixels on black background, it should have shown the boot
log messages. Instead of the green stripes it should have shown the login
screen. It is a really good idea that the kernel detect that the lid is closed
and keep the internal display turned off and set the resolution to the external
display's native resolution, only too bad that this fails (the older version
2.6.37.6-0.7.1-i586 from the openSUSE Update repository just ignores the fact
that the lid is closed and turns also the built-in display on and sets the
resolution of both displays to the native resolution of the built-in display,
which is 1440x900).

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