Bug 58561

Summary: [hsw vga] the external screen will become white and show nothing when switch screen to clone mode or external VGA only
Product: DRI Reporter: EvaWang <evawang>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: major    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
intel_haswell_hotplug_vga_external_white_screen.log none

Description EvaWang 2012-12-20 10:01:07 UTC 
Created attachment 71843 [details]
intel_haswell_hotplug_vga_external_white_screen.log

When switch screen to clone mode(LCD+external VGA/HDMI) or external mode(VGA/HDMI only) using the following command, the external screen will become white and show nothing. attached log is error code. This only happens on Lenovo Yx10 Sharkbay platform, Ivy bridge is OK.

         Clone mode(LCD+external VGA): xrandr --output eDP1 --mode 1024x768 --output VGA1 --mode 1024x768(the shared resolution ratio of eDP and VGA)
         External mode(VGA only): xrandr --output eDP1 --off --output VGA1 --mode 1366x768(the highest resolution ratio, it is different on different computer)
Comment 1 Daniel Vetter 2012-12-20 10:07:59 UTC 
Which kernel is this?
Comment 2 EvaWang 2012-12-26 06:59:28 UTC 
kernel 3.7.0 with intel branch 3.7.0 for haswell
Comment 3 EvaWang 2013-01-03 08:34:49 UTC 
The issue can't reproduced after merged kernel 3.8.0 i915 driver. Thanks!!

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