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 Touch seeded packages, which is subscribed to libdrm in Ubuntu. https://bugs.launchpad.net/bugs/1522922 Title: Screen flickering in Intel i915 driver Status in Nouveau Xorg driver: Incomplete Status in libdrm package in Ubuntu: Confirmed Bug description: There's an upstream bug reported here https://bugs.freedesktop.org/show_bug.cgi?id=91393 that causes screen flickering when using the Intel i915 builtin driver (at resolutions lower than the maximal one). I think that it will be fixed in newer kernel versions, but for the time being, as reported here https://bugs.freedesktop.org/show_bug.cgi?id=91393#c25 (and as personally tested) reverting those two commits fixes the problem. Would that be possible to release a fixed version for the 4.2.0 stream? ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-19-generic 4.2.0-19.23 ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6 Uname: Linux 4.2.0-19-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bettini 1378 F.... pulseaudio /dev/snd/controlC1: bettini 1378 F.... pulseaudio CurrentDesktop: KDE Date: Fri Dec 4 19:01:00 2015 HibernationDevice: RESUME=UUID=7ddbc972-3ad6-40de-9313-2bb9395145f9 InstallationDate: Installed on 2015-05-08 (210 days ago) InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: Dell Inc. Dell Precision M3800 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-generic root=UUID=dd2c7064-53b9-4720-96ab-5e8a3f2db3ea ro noprompt quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-19-generic N/A linux-backports-modules-4.2.0-19-generic N/A linux-firmware 1.149.3 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2015-11-07 (26 days ago) dmi.bios.date: 08/17/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A10 dmi.board.name: Dell Precision M3800 dmi.board.vendor: Dell Inc. dmi.board.version: A10 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA10:bd08/17/2015:svnDellInc.:pnDellPrecisionM3800:pvrA10:rvnDellInc.:rnDellPrecisionM3800:rvrA10:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Dell Precision M3800 dmi.product.version: A10 dmi.sys.vendor: Dell Inc. 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