<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [Ubuntu 19.04] The screen display incompleted when rotate the screen to left/right" href="https://bugs.freedesktop.org/show_bug.cgi?id=110375#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [Ubuntu 19.04] The screen display incompleted when rotate the screen to left/right" href="https://bugs.freedesktop.org/show_bug.cgi?id=110375">bug 110375</a> from <a class="email" href="mailto:stanislav.lisovskiy@intel.com" title="Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>"> Stanislav Lisovskiy</a> <pre>I have investigated this issue a bit on Friday. Problem ended up in userspace. As we have noticed the screen stays blank for eDP, because primary plane is disabled, whicl cursor still visible. I was looking for some wrong condition or calculation in kernel, but basically it is just userspace which assigns NO_FB to primary active plane at some point when other screen is rotated. Then skl_plane_check-drm_atomic_helper_check_plane_state(called from atomic_check) detects that and turns off the plane completely, making it further unusable. This is done in drm_atomic_set_fb_for_plane function. I can fix it by adding a simple check there which forbids removing FB from primary plane if it is active. Not sure if this patch is correct or will be accepted, but lets see :)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>