GNOME Bugzilla – Bug 763688
Flickering and unusable shell under Wayland only
Last modified: 2016-11-24 20:35:22 UTC
With the latest continuous image (used in Boxes) I see flickering every other second or so and every time I try to go to the Shell overview I'm brought back to the "desktop". Also my mouse cursor doesn't show.
This bug only occurs with the Wayland session.
Can I switch to a non Wayland session without a mouse cursor?
(In reply to Alexandre Franke from comment #2) > Can I switch to a non Wayland session without a mouse cursor? You can use keyboard navigation - tab to get to the gear icon, return to open it, and up/down arrows to select the Xorg session.
Indeed. Thanks. I can confirm this only happens with Wayland.
On Continuous 3.21.x, the Xorg session will not launch from GDM. In a Wayland session with Video=QXL, I get the flicker, but the cursor is present. With Video=VGA, there is no flicker and no cursor.
I can confirm that in a qemu-kvm VM with current continuous builds (3.21.x) and the default wayland session the screen and mouse pointer flicker. You get dropped back from the activities overview to the desktop immediately. with video=vga there is no flicker and the mouse pointer missing, but I cant login to the normal session. Classic mode works fine, tough.
(In reply to Christian Kirbach from comment #6) > with video=vga there is no flicker and the mouse pointer missing, but I cant > login to the normal session. Classic mode works fine, tough. That is odd - classic-mode is just the normal session plus a couple of extensions. Any chance you can get logs from the failed login attempt?
Created attachment 335877 [details] sys journal of login attempt to classic mode with video=vga in kvm-qemu
(In reply to Florian Müllner from comment #7) > (In reply to Christian Kirbach from comment #6) > > with video=vga there is no flicker and the mouse pointer missing, but I cant > > login to the normal session. Classic mode works fine, tough. > > That is odd - classic-mode is just the normal session plus a couple of > extensions. Any chance you can get logs from the failed login attempt? Sure, attached the journal. Looks like gnome-session-binary aborts due to missing video acceleration.
With video=qxl the classic mode runs just fine, but the normal session is affected by the flickering and overview menu closing regularly in quick intervals.
This is Red Hat #1266484. It appears to be a kernel bug, so there's probably not much value in keeping a GNOME bug open for it.
(In reply to Michael Catanzaro from comment #11) > This is Red Hat #1266484. It appears to be a kernel bug, so there's probably > not much value in keeping a GNOME bug open for it. Agreed.
Let's close it, then. :)