Bug 82285

Summary: displayport detects monitor, but the monitor goes into power saving
Product: xorg Reporter: Glen Ogilvie <nelg>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
This tar.gz contains dmesg, journalctl output, xorg logs, lspci, dmidecode, xrandr none

Description Glen Ogilvie 2014-08-07 06:48:51 UTC 
Created attachment 104205 [details]
This tar.gz contains dmesg, journalctl output, xorg logs, lspci, dmidecode, xrandr

I can't get my laptop's displayport output to drive my monitor, using the
free ati driver.  It does work on the legacy driver, from ATI, however, that
only works on X <= 1.12, which is no fun to be stuck with, as no current
distro ships old versions of X.  I have a 27 inch dell monitor, so using
HDMI is not great option, as it can't drive a high enough resolution to look
sharp, as I want 2560 x 1440.

I think Bug 45291 is basically the same problem, and I've updated it to include my hardware as well.

My monitor is a :DELL U2711
Video card: Mobility Radeon HD 4650
Laptop: Dell Studio 1747

This bug has a boot with drm.debug=6 attached, and as much other debugging infomation as I could find.

I am happy to work fairly closely on this, if someone has ideas or information they need me to collect.
Comment 1 Alex Deucher 2014-08-25 13:53:44 UTC 

*** This bug has been marked as a duplicate of bug 45291 ***

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.