** Summary changed:
- screen flickering on XPS13 9350
+ screen flickering on XPS13 9350/9550
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Title:
Screen flickers on XPS 13 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.
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** Changed in: linux
Status: Incomplete => Fix Released
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Title:
screen flickering on XPS13 9350
Status in Linux:
Fix Relea
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:~$
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Please could someone explain how I upgrade my kernel to the one with the
fix. Thanks.
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Title:
screen flickering on XPS13 9350
Statu
** Tags added: cherry-pick
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Title:
screen flickering on XPS13 9350
Status in Linux:
Incomplete
Status in linux package in Ubuntu:
I suspect even the oldest nightly works fine.. so check -next builds
starting from the second newest (newest was already found working)
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could you bisect either drm-intel-next or -nightly kernels to point out
where it got fixed?
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Title:
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
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Title:
screen flickering on XPS
** Bug watch added: freedesktop.org Bugzilla #91393
https://bugs.freedesktop.org/show_bug.cgi?id=91393
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Title:
screen flickering
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.
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while on kernel 4.6 rc4 screen-flicker is present
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Title:
screen flickering on XPS13 9350
Status in Linux:
Incomplete
Status in l
i am on 4.6.0-997-generic drm-intel-next and flicker is not present
since one week
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Title:
screen flickering on XPS13 9350
Status i
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
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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
> addin
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 workar
Is there anything i can do to support?
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Title:
screen flickering on XPS13 9350
Status in Linux:
Incomplete
Status in linux packag
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
1:2.99.917+604+gff0ab
** Changed in: linux
Status: In Progress => Incomplete
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Title:
screen flickering on XPS13 9350
Status in Linux:
Incomplete
0 is the default, PSR isn't enabled (yet)
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Title:
screen flickering on XPS13 9350
Status in Linux:
In Progress
Status in linux pa
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
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https://b
you didn't install linux-image-extra, which has most of the drivers,
including i915..
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Title:
screen flickering on XPS13 9350
Statu
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
https://help
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
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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
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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
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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.
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1561729/comments/15
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Title:
screen flickering on XPS13 9350
Status in Linux:
as mentioned in #1561729:
kernel 4.6rc1 also did not fixed the issue for me
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Title:
screen flickering on XPS13 9350
Status in Linu
No change with 4.6-rc1-wily for me
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Title:
screen flickering on XPS13 9350
Status in Linux:
Unknown
Status in linux package in Ub
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 that
** Also affects: linux via
https://bugs.freedesktop.org/show_bug.cgi?id=94593
Importance: Unknown
Status: Unknown
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Title:
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.
>
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> duplic
For me, the flickering happens with or without AC. And First flicker
always ends up having the FIFO error message being printed.
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Titl
** Attachment added: "dmesg.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1554613/+attachment/4620483/+files/dmesg.log
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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 accompanie
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
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Thomas Bonfort, please provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
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** Tags removed: latest-bios-1.2.3
** Tags added: latest-bios-1.3.2
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Title:
screen flickering on XPS13 9350
Status in linux package
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 4.4
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
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introduced in LP: #1540390
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Title:
screen flickering on XPS13 9350
Status in linux package in Ubuntu:
Confirmed
Bug description:
4.5.0-040500 is still affected
** Tags removed: kernel-bug-exists-upstream-4.5-rc7
** Tags added: kernel-bug-exists-upstream-4.5
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Tit
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
P
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:
[drm:intel_cpu_fi
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 m
** 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 4.4.0-8-generic
** Tags removed: needs-bisect
** Tags added: bisect-done
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Title:
screen flickering on XPS13 9350
Status in linux package in Ubuntu:
also present in 4.5.0-994-generic_4.5.0-994.201603152201 from drm-intel-
nightly
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Title:
screen flickering on XPS13 9350
Status in
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.
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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.
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
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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
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h
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
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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 https
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
screen flick
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
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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 http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
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