Acer Revo RL85 GPU HANG
My Acer Revo RL85 with Intel Celeron 2957U 4 GB DDR3L-SDRAM fails to run the X server with Debian testing "Bullseye" with kernel versions 5.7.0-1 and 5.7.0-2. All worked fine with kernel 5.6.0-2.
It displays a black screen or SDDM login screen with a moving mouse cursor but is erratic in behaviour and doesn't progress to a KDE desktop. With the 5.6 kernel the SDDM auto-login works and the KDE desktop is displayed without any problems.card0-errordmesg.txtxsession-errors