Bug 13103

Summary:	i915 closing laptop lid kills LVDS until reboot
Product:	Drivers	Reporter:	Saikat Guha (saikat)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED PATCH_ALREADY_AVAILABLE
Severity:	high	CC:	gordon.jin
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.29.1-70.fc11.i586	Subsystem:
Regression:	Yes	Bisected commit-id:

Description Saikat Guha 2009-04-16 10:50:56 UTC

I am using KMS with a Intel 915GM card (on a Thinkpad X41 Tablet).
Closing and reopening the lid blanks the display permanently until a reboot. Same for docking/undocking. 

This happens even before X starts. This is not related to suspend/hibernate etc. The problem occurs only with modeset enabled.

I can still fly blind (or log in over the network); and vbetool dpms
does manage to turn the backlight on or off, but the display remains
black. 

I posted a video of the bug at:
http://www.youtube.com/watch?v=-q1N4iosOCI

I posted dmesg and Xorg logs in the following Fedora bz:
https://bugzilla.redhat.com/show_bug.cgi?id=489907

Comment 1 Jesse Barnes 2009-04-16 16:45:32 UTC

On Thu, 16 Apr 2009 10:50:57 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=13103
> 
>            Summary: i915 closing laptop lid kills LVDS until reboot
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 2.6.29.1-70.fc11.i586
>           Platform: All
>         OS/Version: Linux
>               Tree: Fedora
>             Status: NEW
>           Severity: high
>           Priority: P1
>          Component: Video(DRI)
>         AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
>         ReportedBy: saikat@cs.cornell.edu
>         Regression: Yes
> 
> 
> I am using KMS with a Intel 915GM card (on a Thinkpad X41 Tablet).
> Closing and reopening the lid blanks the display permanently until a
> reboot. Same for docking/undocking. 
> 
> This happens even before X starts. This is not related to
> suspend/hibernate etc. The problem occurs only with modeset enabled.
> 
> I can still fly blind (or log in over the network); and vbetool dpms
> does manage to turn the backlight on or off, but the display remains
> black. 
> 
> I posted a video of the bug at:
> http://www.youtube.com/watch?v=-q1N4iosOCI
> 
> I posted dmesg and Xorg logs in the following Fedora bz:
> https://bugzilla.redhat.com/show_bug.cgi?id=489907

Can you file this at freedesktop.org instead?  Register dumps from
intel_reg_dumper from before and after the lid close should help narrow
this down quickly, so please include those too.

Thanks,

Comment 2 Saikat Guha 2009-04-16 16:59:48 UTC

Thanks. Freedesktop bz created:
https://bugs.freedesktop.org/show_bug.cgi?id=21230

Comment 3 Gordon Jin 2009-09-17 03:42:25 UTC

Let's track at freedesktop (which has patch available).