After reinstalling Arch Linux I'm experiencing some issues with GDM.Currently I'm using GNOME 3.22.1 with Intel HD Graphics 5600 (Broadwell GT2) on a laptop using an external monitor.When I lock the session it is supposed to turn off the screen but instead, it goes off for a second and turn back on. After that it keeps trying to turn the screen off but it always turn back on.I can't be precise about what added this added this issue since I've reinstalled the whole system.systemctl status gdm: gdm.service - GNOME Display Manager    Loaded: loaded  (/usr/lib/systemd/system/gdm.service; enabled; vendor preset:  Active: active (running) since Tue 2016-11-08 01:05:44 BRST; 1h 45min  ago  Main PID: 505 (gdm)      Tasks: 3 (limit: 4915)    CGroup: /system.slice/gdm.service             505 /usr/bin/gdmNov 08 01:05:44 foobar-pc systemd[1]: Starting GNOME Display  Manager... Nov 08 01:05:44 foobar-pc systemd[1]: Started GNOME Display  Manager. Nov 08 01:05:51 foobar-pc gdm-password][826]:  pam_unix(gdm-password:session)dmesg:http://pastebin.com/06ndpw7E[drm:intel_fbc_work_fn [i915]] ERROR vblank not available for FBC on  pipe Ajournalctl(probably not related):-- Reboot -- Oct 01 20:24:44 foobar-pc kernel: RIP  [] bfq_dispatch_requests+0x311/0x420 Oct 01 20:25:09  foobar-pc kernel: NMI watchdog: BUG: soft lockup - CPU#4 stuck for  22s! [mount.ntfs:1588] Oct 01 20:25:37 foobar-pc kernel: NMI watchdog:  BUG: soft lockup - CPU#4 stuck for 23s! [mount.ntfs:1588] Oct 01  20:26:05 foobar-pc kernel: NMI watchdog: BUG: soft lockup - CPU#4  stuck for 23s! [mount.ntfs:1588]  -- Reboot -- Oct 03 18:03:49 foobar-pc sudo[16463]: bernardo : a password is required ; TTY=pts/0 ;  PWD=/tmp/yaourt-tmp-bernardo/aur-linux-mainline ; USER=root ;  COMMAND=list /usr/bin/ Oct 03 19:44:46 foobar-pc sudo[16706]: bernardo  : a password is required ; TTY=pts/0 ;  PWD=/tmp/yaourt-tmp-bernardo/aur-linux-mainline ; USER=root ;  COMMAND=list /usr/bin/  -- Reboot --
GDM struggle to turn the screen off
arch linux;display;intel graphics;gdm