<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [NVD9] Unable to start X on ThinkPad T420s laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=56615#c11">Comment # 11</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [NVD9] Unable to start X on ThinkPad T420s laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=56615">bug 56615</a> from <a class="email" href="mailto:mark.cave-ayland@ilande.co.uk" title="Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>"> Mark Cave-Ayland</a> <pre>I've seen some interesting patches go through the mailing list which I thought may be related to this bug, so I thought I'd update to 3.6.11-rc2 and see if there was any improvement. Unfortunately I am still unable to use the DisplayPort connector in order to drive an external monitor :( Just to summarise for those who are interested: 1) My laptop is set so that it is forced to use nVidia graphics adapter, i.e. the Optimus mode is disabled in the BIOS. 2) If I run Nouveau without anything plugged into the DisplayPort connector on my laptop, it runs fine. 3) If I connect an external monitor to the DisplayPort connector and reboot then X freezes upon startup, even before enabling the external display. Under 3.6.11-rc2 I see the following in dmesg: nouveau E[ PDISP][0000:01:00.0] chid 1 mthd 0x0080 data 0x00000000 0x00005080 0x0000000 4) If I now unplug the DisplayPort connector, I see the following in dmesg: nouveau E[ DRM] DDC responded, but no EDID for DP-1 5) If I now try and start X again, it still freezes but for less time than before. 6) Restarting the laptop without the DisplayPort connector plugged in is required in order for Nouveau to work on the in-built display once again. Any further debugging information available on request. I have an up-to-date git tree to which I can temporarily apply diagnostic patches if required. Many thanks, Mark.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>