24.2 had a new kernel, but all later images have the same, I can't see anything that changed since that would affect this.
I'm susprised you are seeing this on three different systems, but there havent been any other reports of this. It may be different bugs that all cause Xorg to fail loading.
Is it only happening on the Live images? or also on installed system? You certainly shouldnt see the user menu when booting a live session and if you do that means presumable that gdm has been respawned at some point after the failure.
Might be worth testing with a newer kernel, either latest mainline or the 4.4 in -proposed atm.
24.2 had a new kernel, but all later images have the same, I can't see anything that changed since that would affect this.
I'm susprised you are seeing this on three different systems, but there havent been any other reports of this. It may be different bugs that all cause Xorg to fail loading.
Is it only happening on the Live images? or also on installed system? You certainly shouldnt see the user menu when booting a live session and if you do that means presumable that gdm has been respawned at some point after the failure.
Might be worth testing with a newer kernel, either latest mainline or the 4.4 in -proposed atm.