Bug 31112

Summary: External display (digital) does not work. (DP to DVI)
Product: xorg Reporter: Jim Gettys <jg>
Component: Driver/intelAssignee: Carl Worth <cworth>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium CC: jg
Version: 7.5 (2009.10)   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description Jim Gettys 2010-10-25 15:24:02 UTC 
If I try to use an external flat panel on my HP 2540p in digital mode, it does not work.

This is with a Display Port to DVI adapter cable, to a ChiMei flat panel (1620x1050 IIRC).

The flat panel can be driven fine from the BIOS, by the appropriate Fn screen press, so I know the hardware is working correctly.

The flat panel also works correctly in VGA mode; I can plug in, it is recognized, and works correctly as far as I can tell.

The xorg driver was updated to:
2:2.12.902+git20101018.a1c54f69-0ubuntu0sarvatt

xrandr never reports the external display at all.  Since the driver has been updated, it does report DP1 as a possible output.

This is the same machine as in bug #29821.

FWIW: 
  o this machine also hangs on suspend something like half the time, 
  o Powering up the panel takes about 1 second from pressing a key, which is long.
  o After resume, playing flash video in full screen mode may run very slowly (of order 1fps).
Comment 1 Jim Gettys 2010-12-13 17:26:21 UTC 
Now working for me in kernel.org 2.6.37-rc5.

HDMI is also working for me.

Still having intermittent problems when booting with the eDP panel turning on, and therefore can't really test suspend/resume either.  But this particular bug is fixed as far as I'm concerned.  So I'm closing as fixed.

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