<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#c21">Comment # 21</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>Hi Ilia, I finally managed to get a working network connection on boot, and it looks as if remote SSH is working. So I asked a friend who is fluent in X to ssh in remotely and perform some tests :) Things we found were: 1) On boot dmesg shows "nouveau E[ DRM] DDC responded, but no EDID for DP-1" in the kernel logfile 2) xrandr -q --verbose works but very slowly; each line is noticeably lethargic when appearing on screen. This output shows 3 DP outputs, but there is only one DP connector on the laptop?! The physical ports on the laptop are: LVDS-1 - on-board LCD screen VGA-1 - external VGA output (possibly only wired to on-board Intel chip?) DP-1 - external DP output (wired to NV9 chip only) 3) When manually trying to switch between the LVDS/DP-1 outputs with xrandr there was a backtrace in the logs from drm_mode_set_config_internal(). I'll attach the related files onto this bug report. 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>