Bug 88661

Summary: [gma500] LVDS black screen if VGA connected
Product: Drivers Reporter: Josep Pujadas-Jubany (jpujades)
Component: Video(DRI - Intel)Assignee: intel-gfx-bugs (intel-gfx-bugs)
Status: RESOLVED INSUFFICIENT_DATA    
Severity: normal CC: alan, intel-gfx-bugs
Priority: P3    
Hardware: Intel   
OS: Linux   
URL: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1393945
Kernel Version: 3.18.0-031800rc5-generic Subsystem:
Regression: No Bisected commit-id:

Description Josep Pujadas-Jubany 2014-11-21 18:06:59 UTC
LVDS black screen if external VGA plugged at power on.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1393945
Comment 1 Alan 2014-12-08 20:00:55 UTC
The gma500 is basically undocumented. Although its on Intel hardware it's mostly an imagination device with no manuals. The driver was built out of the pieces that were used with a proprietary user server without documentation.

If you boot with all the drm debug turned on then it may give us some clues, but probably we can't fix it.