[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350/9550

** Summary changed: - screen flickering on XPS13 9350 + screen flickering on XPS13 9350/9550 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: Screen flickers on XPS 13

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

The bug is apparently fixed in the latest intel-drm-next branch. We still need to identify the fix and backport it to the kernel in Ubuntu. Any bisecting help is appreciated. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Changed in: linux Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux: Fix

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Please ignore my last comment I figured it out: plattr@beatrice:~$ uname -a Linux beatrice 4.6.0-994-generic #201604242200 SMP Mon Apr 25 02:03:20 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux plattr@beatrice:~$ -- You received this bug notification because you are a member of Kernel Packages, which

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Please could someone explain how I upgrade my kernel to the one with the fix. Thanks. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Tags added: cherry-pick -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux: Incomplete Status in linux package in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I suspect even the oldest nightly works fine.. so check -next builds starting from the second newest (newest was already found working) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

could you bisect either drm-intel-next or -nightly kernels to point out where it got fixed? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I've been on 4.6.0-997-generic drm-intel-next for a day and can confirm that the flickering is gone -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Bug watch added: freedesktop.org Bugzilla #91393 https://bugs.freedesktop.org/show_bug.cgi?id=91393 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Currently running Xenial. Kernel 4.4.0-18 and 4.4.0-21 have the screen flicker. Currently on Kernel 4.3.3-040303. No screen flicker. Please let me know what other information you need to help debug this. -- You received this bug notification because you are a member of Kernel Packages, which is

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

while on kernel 4.6 rc4 screen-flicker is present -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux: Incomplete Status in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

i am on 4.6.0-997-generic drm-intel-next and flicker is not present since one week -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

i am on 4.4.0-21-generic with intel_idle.max_cstate=0 now but I still got the flickering display: [ 188.260368] [drm:intel_cpu_fifo_underrun_irq_handler [i915_bpo]] *ERROR* CPU pipe A FIFO underrun -- You received this bug notification because you are a member of Kernel Packages, which is

Re: [Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I will try current Kernel with disable c-states give me a few hours. Moondog <1554...@bugs.launchpad.net> schrieb am Mi., 20. Apr. 2016, 07:21: > While I noticed the screen-flicker doesn't show while compiling a linux > kernel, I am guessing the problem might be related to c-states. After >

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

While I noticed the screen-flicker doesn't show while compiling a linux kernel, I am guessing the problem might be related to c-states. After adding "intel_idle.max_cstate=0" to the kernel command-line the screen- flicker hasn't shown anymore. While disabling c-states is not acceptable as a

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Is there anything i can do to support? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux: Incomplete Status in linux

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Same issue on Dell XPS 13 9343. Running Arch Linux, 4.4.5-1-ARCH, x86_64. $ pacman -Q | grep xf86-video-intel xf86-video-intel 1:2.99.917+604+gff0ab2c-1 $ pacman -Q | grep xorg-server xorg-server 1.18.3-1 Things went better when I upgraded from 1:2.99.917+587+gc186d4d-1 to

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Changed in: linux Status: In Progress => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux:

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

0 is the default, PSR isn't enabled (yet) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux: In Progress Status in linux

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Timo: with -extra installed I can now boot up successfully. The flickering still occurs with enable_psr=0, 1 and 2 . It seems to occur more frequently when set to 0 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

you didn't install linux-image-extra, which has most of the drivers, including i915.. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Launchpad has imported 4 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=94593. If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

dmesg of failed startup with 4.4.0-17 ** Attachment added: "dmesg.4.4.0-17" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1554613/+attachment/4622561/+files/dmesg.4.4.0-17 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

with 4.4.0-16: flickers with or without i915.enable_psr=1 , and with or without reverting rodrigo's commit found by bisection with 4.4.0-17: X does not start , I'm left with a blank screen. happens with or without i915.enable_psr -- You received this bug notification because you are a member

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

failed X startup with 4.4.0-17. Let me know if you want more info. ** Attachment added: "Xorg.0.log.old" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1554613/+attachment/4622524/+files/Xorg.0.log.old -- You received this bug notification because you are a member of Kernel Packages,

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

i915_bpo is tracking 4.6, and 4.4.0-17 has essentially the same driver as 4.6-rc1. Does reverting that commit fix it? Also, you could try booting with 'i915.enable_psr=1' to actually use PSR, which should be stable on SKL now, assuming X is using the intel driver. -- You received this bug

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1561729/comments/15 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux:

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

as mentioned in #1561729: kernel 4.6rc1 also did not fixed the issue for me -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

No change with 4.6-rc1-wily for me -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in Linux: Unknown Status in linux package in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I am still not 100% sure but after a day with this kernel: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-rc1-wily/ I can report the following: 1. No flickering 2. No more kernel dumps/bugs reports 3. No more i915 warnings 4. No more suspend issues 5. No more Dell WMI events errors 6. Not

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Also affects: linux via https://bugs.freedesktop.org/show_bug.cgi?id=94593 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613

Re: [Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I do confirm that behavior Thomas Bonfort schrieb am Sa., 2. Apr. 2016, 18:05: > For me, the flickering happens with or without AC. And First flicker > always ends up having the FIFO error message being printed. > > -- > You received this bug notification because you

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

For me, the flickering happens with or without AC. And First flicker always ends up having the FIFO error message being printed. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Attachment added: "dmesg.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1554613/+attachment/4620483/+files/dmesg.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I would like to add few observations: 1. Seems like the issue is Power Management related since I've never experienced it with AC adapter connected and sometimes almost instantly after disconnecting it, the flickering is started. 2. Sometimes first "flick" after reboot or PM change is

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date 1.3.3 03/01/2016 ** Tags removed: latest-bios-1.3.2 ** Tags added: latest-bios-1.3.3 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Thomas Bonfort, please provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Tags removed: latest-bios-1.2.3 ** Tags added: latest-bios-1.3.2 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in linux

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Stille present with 4.4.0-16 , and after updating BIOS to latest 1.3.3 version ** Description changed: see LP: #1552304 does not affect 4.4.0-8 - affects 4.4.0-9 to 4.4.0-13 + affects 4.4.0-9 to 4.4.0-16 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-generic

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

upstream issue opened at : https://bugs.freedesktop.org/show_bug.cgi?id=94593 ** Bug watch added: freedesktop.org Bugzilla #94593 https://bugs.freedesktop.org/show_bug.cgi?id=94593 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

introduced in LP: #1540390 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in linux package in Ubuntu: Confirmed Bug

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

4.5.0-040500 is still affected ** Tags removed: kernel-bug-exists-upstream-4.5-rc7 ** Tags added: kernel-bug-exists-upstream-4.5 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

After a couple of hours using 4.0.0.13 the flickering has re-appeared. ** Description changed: see #1552304 does not affect 4.4.0-8 - affects 4.4.0-9 to 4.4.0-11 + affects 4.4.0-9 to 4.4.0-13 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-generic 4.4.0.11.12

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I have finished bisecting the commits and the switch from i915 to i915_bpo seems to be the culprit. There are quite a few candidates but that's because all those skipped commits failed to build/compile. Note that on the first flicker after booting, this message appears in dmesg:

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Thomas Bonfort. the issue you are reporting is an upstream one. Could you please report this problem following the 1.1 - DRM Kernel instructions verbatim at https://01.org/linuxgraphics/documentation/how- report-bugs ? Please provide a direct URL to your post when it becomes available so that it

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Description changed: - see #1552304 + see LP: #1552304 does not affect 4.4.0-8 affects 4.4.0-9 to 4.4.0-13 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-generic 4.4.0.11.12 ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2 Uname: Linux

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Tags removed: needs-bisect ** Tags added: bisect-done -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in linux package in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

also present in 4.5.0-994-generic_4.5.0-994.201603152201 from drm-intel- nightly -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen flickering on XPS13 9350 Status in

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I have tested 4.0.0-13 which does not seem to exhibit the flickering present from 4.0.0-9 to 4.0.0-12. It does however now present tearing artifacts when switching focus between windows, see https://www.dropbox.com/s/opirfyzklathw3i/VID_20160316_112021.m4v?dl=0 for a screengrab. -- You received

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Christopher, Yes I have read that section but it is not useful as selecting between bad/good is already the required workflow. The issue is that the documentation refers to using the packaging scripts in the debian/ subdir, which is not present and/or usable in the intermediate bisecting steps.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Thomas Bonfort, have you had a chance to review the section https://wiki.ubuntu.com/Kernel/KernelBisection#Bisecting:_a_merge_base_must_be_tested ? ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I think this bug is caused by the backported i915 driver in 4.4.0-9 which is being loaded as i915_bpo. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I'm unable to run the bisection. The first bisect step between Ubuntu-4.4.0-8.23 and Ubuntu-4.4.0-9.24 from git://kernel.ubuntu.com/ubuntu/ubuntu-xenial.git outputs "Bisecting: a merge base must be tested" and leaves me in a state where I have no debian/ subdir to allow me to launch the build --

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Thomas Bonfort, the next step is to fully commit bisect from kernel 4.4.0-8 to 4.4.0-9 in order to identify the last good kernel commit, followed immediately by the first bad one. This will allow for a more expedited analysis of the root cause of your issue. Could you please do this following

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1554613 Title: screen

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

I have tested 4.5.0-040500rc7-generic which is affected. I've added the kernel-bug-exists-upstream-4.5-rc7 tag, let me know if that what you were expecting from me. ** Tags added: kernel-bug-exists-upstream-4.5-rc7 -- You received this bug notification because you are a member of Kernel

[Kernel-packages] [Bug 1554613] Re: screen flickering on XPS13 9350

Thomas Bonfort, thank you for reporting this and helping make Ubuntu better. In order to allow additional upstream developers to examine the issue, at your earliest convenience, could you please test the latest upstream kernel available from