[Bug 561802] Re: [i915] blank screen on Latitude E6410

[Don Thompson]

Dell Latitude E6410, BIOS A03
(CPU0: Intel(R) Core(TM) i5 CPU       M 520  @ 2.40GHz stepping 02)
agpgart-intel 0000:00:00.0: Intel HD Graphics Chipset
agpgart-intel 0000:00:00.0: detected 32764K stolen memory
agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xe0000000

Linux version 2.6.35-20-generic (buildd at berkelium) (gcc version 4.4.3
(Ubuntu 4.4.3-4ubuntu5) ) #29~lucid1-Ubuntu SMP Tue Sep 7 13:27:10 UTC
2010 (Ubuntu 2.6.35-20.29~lucid1-generic 2.6.35.4)

As per #141, no X graphics on  internal panel.

Fn+F8 to switch displays doesn't effect any control over which display is active.
External monitor is detected (but only if plugged in during Linux boot) & X display present on that monitor.
Menu -> System -> Preferences -> Monitors exhibits inconsistent behaviour. After previous reboot it did detect both displays & it was poss to turn "Seiko" panel display on/off - NB only backlight evident.  Left panel in off state, power-down, booted again - only external monitor found. Internal not found and backlight off. 

>From System Testing applet:
The following screens and video modes have been detected on your system:

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 304mm x 228mm
   1024x768       60.0*+   75.1  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)

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[i915] blank screen on Latitude E6410
https://bugs.launchpad.net/bugs/561802
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