Created attachment 202891 [details] Xorg.log I am running 4.4.1 on Arch x86_64 and have noticed that this update (coming from 3.4.5) causes breakage of Xorg where the monitor goes to sleep but does not wake up from the sleep state. I have to `systemctl restart display-manager` in order to revive the Xorg display. I attached my full /var/log/Xorg.log but the error is shown below and there is nothing relevant in the output of dmesg: (EE) intel(0): sna_mode_shutdown_crtc: invalid state found on pipe 0, disabling CRTC:21 This machine is an Intel i7-4790K (Haswell) using the onboard graphics chip connected to the monitor via HDMI. I am using the distro provided drivers (xf86-video-intel 1:2.99.917+519+g8229390). I am glad to provide additional debug info upon request. I have just rebooted using the 'drm.debug=14' kernel parameter and will update the report if I am able to uncover any helpful troubleshooting data with it.
The addition of that kernel parameter does not change the lack of output in dmesg.
Please file new i915 bugs at the freedesktop.org bugzilla: https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel