patch https://patchwork.freedesktop.org/patch/66697/ DOESN'T solve the flickering problem on my computer.
What I did: 1. installed generic kernel and headers from http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2015-12-24-wily/ 2. get the sources from the git://anongit.freedesktop.org/drm-intel branch drm-intel-nightly (commit number: ec0382c73cb1adc972bebdd94afad3f0ea117114) 3. applied the patch https://patchwork.freedesktop.org/patch/66697/ 4. compiled the i915 driver and installed it: mykern=${1:-$(uname -r)} cp /usr/src/linux-headers-$mykern/Module.symvers . # Prep tree cp /boot/config-$mykern ./.config make oldconfig make prepare make modules_prepare # Build only the needed directories make SUBDIRS=drivers/gpu/drm/i915 modules [ -s /lib/modules/$mykern/kernel/drivers/gpu/drm/i915/i915.ko.orig ] || sudo cp /lib/modules/$mykern/kernel/drivers/gpu/drm/i915/i915.ko{,.orig} sudo cp drivers/gpu/drm/i915/i915.ko /lib/modules/$mykern/kernel/drivers/gpu/drm/i915/ 5. reboot But. Now with the kernel 4.4.xx if I run 'xset dpms force off' just after the boot then the flicker is gone. grep of the last boot syslog: $ grep drm /tmp/syslog Dec 24 11:29:49 chrome kernel: [ 2.028119] [drm] Initialized drm 1.1.0 20060810 Dec 24 11:29:49 chrome kernel: [ 2.066980] [drm] Memory usable by graphics device = 4096M Dec 24 11:29:49 chrome kernel: [ 2.066985] [drm] Replacing VGA console driver Dec 24 11:29:49 chrome kernel: [ 2.067495] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). Dec 24 11:29:49 chrome kernel: [ 2.067498] [drm] Driver supports precise vblank timestamp query. Dec 24 11:29:49 chrome kernel: [ 2.067501] [drm] failed to find VBIOS tables Dec 24 11:29:49 chrome kernel: [ 2.210886] [drm] Initialized i915 1.6.0 20151218 for 0000:00:02.0 on minor 0 Dec 24 11:29:49 chrome kernel: [ 2.211478] fbcon: inteldrmfb (fb0) is primary device Dec 24 11:29:49 chrome kernel: [ 3.021978] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training Dec 24 11:29:49 chrome kernel: [ 3.025516] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to start channel equalization Dec 24 11:29:49 chrome kernel: [ 3.206466] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device Dec 24 11:30:13 chrome kernel: [ 29.162270] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libdrm in Ubuntu. https://bugs.launchpad.net/bugs/1522922 Title: Screen flickering in Intel i915 driver To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/1522922/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
