http://bugzilla.kernel.org/show_bug.cgi?id=13214
Summary: Blank internal Display on Notebook with Intel GPU
(855GM)
Product: Drivers
Version: 2.5
Kernel Version: 2.6.30-rc3
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI)
AssignedTo: drivers_video-...@kernel-bugs.osdl.org
ReportedBy: djen...@freenet.de
Regression: No
Created an attachment (id=21171)
--> (http://bugzilla.kernel.org/attachment.cgi?id=21171)
Kernel log
Notebook: Acer TravelMate 660, Intel 855GM GPU, internal 15" 1400x1050 LCD.
This behavior can be seen with or without building the kernel with internal KMS
support. Tested Kernel was mainline 2.6.30-rc2 and -rc3. Both scenario are
without X, just multi-user (rl 3, console) on Archlinux. Arch-Kernel 2.6.29
also show this issue.
With builtin KMS: start up the maschine you see some kernel messages. When
drm/i915 is loaded/started the internal display goes blank. Backlight however
is on.
Without builtin KMS: start up the maschine you see all kernel messages and can
login normally on the console. After that I do:
$ modprobe drm debug=1
$ modprobe i915 modeset=1
(please see attached kernel.log)
Here the display goes blank but you can still "fly blind", so system still is
working (same as with builtin KMS). If you have attached an external display,
that one is working as expected. KMS/drm/i915 switches the resolution and you
have the console output on the external display but still no internal display.
With attached external display you can start xserver and it is working as
expected, but output on external display only.
If you need more info/log files please let my know. I would be also able to
test patches if there are any.
--- Comment #1 from Stefan Glasenhardt <ste...@glasen-hardt.de> 2009-04-30
18:12:32 ---
Created an attachment (id=21172)
--> (http://bugzilla.kernel.org/attachment.cgi?id=21172)
Kernel-log with activated KMS, no external display
I've exact the same problem with my notebook (Dell Latitude D505, Intel 855GM).
If i attach an external monitor (VGA or DVI) KMS works perfectly.
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