<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [HSW] i915: null pointer in intel_dp_max_link_rate+0x5/0x80" href="https://bugs.freedesktop.org/show_bug.cgi?id=102022#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [HSW] i915: null pointer in intel_dp_max_link_rate+0x5/0x80" href="https://bugs.freedesktop.org/show_bug.cgi?id=102022">bug 102022</a> from <a class="email" href="mailto:dhinakaran.pandiyan@intel.com" title="Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>"> Dhinakaran Pandiyan</a> <pre>(In reply to sassmann from <a href="show_bug.cgi?id=102022#c6">comment #6</a>) > (In reply to Dhinakaran Pandiyan from <a href="show_bug.cgi?id=102022#c5">comment #5</a>) > > (In reply to sassmann from <a href="show_bug.cgi?id=102022#c0">comment #0</a>) > > > After switching display inputs on the monitor (Dell U3415W) the screen > > > wouldn't come back from standby. Reproduced this with drm-tip > > > > Thanks for filing this bug. > > > > Can you please describe this a bit more in detail? > > Sure, same setup as in <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [DP] i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up" href="show_bug.cgi?id=90963">bug #90963</a>. > Lenovo w541 docked in ThinkPad Dock with lid close (permanently). > Dell U3415W display connected via DP as the only display. > > > What was the display input switch that caused this? > > The Monitor has 2 DP inputs. Switching input from the DP1, the w541 is > connected to, to the other DP and back is sufficient to cause this problem. > > > What was the DP mode in the monitor at that time? > > Setting monitor to DP 1.1 and DP 1.2 both show the problem. > > > How did you switch the display input? > > Via monitor on-screen menu. > > > Does this happen if you don't force the mode from cmdline? > > That helps, I can switch DP inputs now without a crash! I had to force > monitor input at some point as otherwise the external monitor wouldn't get > detected. Now it seems to work better, so I probably can remove that quirk. > Great! I think the problem is with the user space forcing a mode non-sink connectors. > > Can you please try this hack? > > Already tried the patch from <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [DP] i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up" href="show_bug.cgi?id=90963">bug #90963</a>, didn't help with this.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>