<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Unable to detect monitor modes connected to a TB16 Dell dock" href="https://bugs.freedesktop.org/show_bug.cgi?id=111507#c27">Comment # 27</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Unable to detect monitor modes connected to a TB16 Dell dock" href="https://bugs.freedesktop.org/show_bug.cgi?id=111507">bug 111507</a> from <a class="email" href="mailto:lionel.g.landwerlin@linux.intel.com" title="Lionel Landwerlin <lionel.g.landwerlin@linux.intel.com>"> Lionel Landwerlin</a> <pre>(In reply to Stanislav Lisovskiy from <a href="show_bug.cgi?id=111507#c26">comment #26</a>) > (In reply to Lionel Landwerlin from <a href="show_bug.cgi?id=111507#c25">comment #25</a>) > > (In reply to Stanislav Lisovskiy from <a href="show_bug.cgi?id=111507#c23">comment #23</a>) > > > (In reply to Lionel Landwerlin from <a href="show_bug.cgi?id=111507#c22">comment #22</a>) > > > > (In reply to Stanislav Lisovskiy from <a href="show_bug.cgi?id=111507#c21">comment #21</a>) > > > > > It is kernel command line, which can be edited same way as you add > > > > > drm.debug=0x1e in grub.cfg, just add 3 after drm.debug, so that it looks > > > > > like "drm.debug=0x1e 3". This will make it boot into console mode, without > > > > > GUI, however if it works > > > > > that way we will know at least whether this is GDM messing up things or some > > > > > problem in the kernel. > > > > > > > > I don't have a splash screen during the boot, so before GDM starts, I can > > > > see the console on both monitors. Is that what you wanted to know? > > > > > > How about unplug/plug the display in the console mode? Does it work reliably? > > > > Yep, works fine. > > Please "Revert "drm/i915: Fix DP-MST crtc_mask" from Ville, most likely the > issue is caused by this. Ville's change itself was correct as I understand > however Mutter and some other userspace apps does some stuff like > "intersecting" possible crtc mask which results to 0 after this change. For > console as we checked it does it properly, which explains why you don't have > it there. > So please revert this change you had bisected to and check if that helps. Like I wrote earlier, the bisect was wrong. Sometimes the monitor will manage to work and that screwed up the bisect. Reverting that one patch doesn't actually help.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>