** Description changed:
- *** Possible solution ***
- The bug seems to be gone in 4.4.0-22:
- - https://launchpad.net/ubuntu/+source/linux/4.4.0-22.39
- ***
*** Temporary workaround ***
Install Kernel from one of the following locations:
-
As another user confirms on
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1554613 , the
flickering has disappeared on the latest drm-intel-next
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If the underlying issue is the same then fine. I can confirm that the
resulting appearance of this current bug is very different than what the
video shows in 91393
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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
(In reply to Rodrigo Vivi from comment #32)
> Uhm interesting that even with i915.enable_dc=0 you Thomas are getting
> [ 17.788425] [drm:gen9_set_dc_state] Setting DC state from 00 to 02
>
> What firmware version do you have loaded?
> cat /sys/kernel/debug/dri/0/i915_dmc_info
fw loaded: yes
(In reply to Peter Y. Chuang from comment #39)
> I'm not sure if this is kind of expected for this particular bug, but it
> seems that the problem doesn't happen when the laptop is plugged into the
> power.
Flickering happens with AC plugged here
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(In reply to Rodrigo Vivi from comment #30)
> RC6p/RC6pp split got deprecated few generations ago. So on Skylake RC6 is
> the deepest already.
>
> Thomas, do you confirm disabling RC6 the flickerings goes away for you as
> well?
with i915.enable_rc6=0 the flickering is gone. Maybe unrelated, but
(In reply to thomas bonfort from comment #35)
> (In reply to Rodrigo Vivi from comment #30)
> > RC6p/RC6pp split got deprecated few generations ago. So on Skylake RC6 is
> > the deepest already.
> >
> > Thomas, do you confirm disabling RC6 the flickerings go
Created attachment 122845
dmesg with enable_dc=0 disable_power_well=0 , up to first flicker
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Title:
screen flickering on XPS13 9350
Created attachment 122843
dmesg with drm.debug on 4.4.0-18 up until first flicker
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Title:
screen flickering on XPS13 9350
Status
>what graphical environment you use
KDE plasma
>do you have an external monitor attached?
No
>Is there anything special that triggers the flickering? something like: "it
>starts flickering when having more than one monitor I try to move the cursor
>to the external one"
No special trigger. First
Created attachment 122844
Xorg.0.log
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Title:
screen flickering on XPS13 9350
Status in Linux:
Incomplete
Status in linux package
The bug's status is NEEDINFO. Is there anything more you need from me?
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Title:
screen flickering on XPS13 9350
Status in Linux:
could you quickly walk me through as to how to apply these please? I
know nothing about patchwork.
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Title:
screen flickering on
OK, I'm applying them manually.
The 7th one is failing:
git apply -v /home/tbonfort-scratch/Downloads/7-8*
Checking patch drivers/gpu/drm/i915/i915_dma.c...
error: while searching for:
#include
#include
#include
static int i915_getparam(struct drm_device *dev, void *data,
error: patch
using 3-way:
/**
* i915_driver_init_mmio - setup device MMIO
* @dev_priv: device private
*
* Setup minimal device state necessary for MMIO accesses later in the
* initialization sequence. The setup here should avoid any other device-wide
* side effects or exposing the driver via kernel
Flickering still present on watermarks-wa
cp /boot/config-4.4.0-17-generic .config
make -j 4 deb-pkg INSTALL_MOD_STRIP=1
#answer default on everything except i915 debugging
booted using no specific enable_psr flags
$ dmesg|grep i915
[1.754871] [drm] Finished loading i915/skl_dmc_ver1.bin
booting with enable_psr=1 leads to same results:
$ dmesg|grep i915
[0.00] Command line: BOOT_IMAGE=/boot/vmlinuz-4.6.0-rc2+
i915.enable_psr=1 root=UUID=432cb01b-c9c7-4cb0-8129-5c0abadbf9f8 ro quiet
splash vt.handoff=7
[0.00] Kernel command line:
Rodrigo,
sorry for being a noob here...: what remote should I add to get to that branch?
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Title:
screen flickering on XPS13 9350
can you please advise as to the workflow I should be using to compile a
meaningfull kernel to test this, starting from the config used by
ubuntu?
this is what I'm inclined to do:
make mrproper
cp /boot/config-4.4.0-17-generic .config
make oldconfig
#reply to the questions to the best of my
On top of which SHA do you want me to apply these? Should I apply them
all or test the one by one ?
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Title:
screen flickering on
enable_psr=2 still flickers with 4.4.0-16. unable to try latest 4.4.0-17
as X doesn't start with it.
dmesg|grep i915
[0.00] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-16-generic
i915.enable_psr=2 i915_bpo.enable_psr=2
root=UUID=432cb01b-c9c7-4cb0-8129-5c0abadbf9f8 ro quiet splash
4.4.0-17 (which backports i915 from 4.6.0-rc1 IIUC) flickers with enable_psr =
0, 1 and 2.
My impression after a short test is that the flickering occurs more frequently
when set to 0 than 1 or 2.
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Rodrigo:
I have already tried reverting that commit (in ubuntu's mainline kernel, i.e.
in their backported i915_bpo module) but the flickering still occurs.
I may have messed up my bisect: from memory, b1a14c6e40413f8
78e0d2e3477aa3e8bdac a6d09186fa27dea7 ca1a95334ddaf624c1b0424 may have been
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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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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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
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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Anmar: I have removed tlp and rebooted but the flickering still occurs.
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Title:
screen flicker on Dell XPS 13 9350 after kernel
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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** 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
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
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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This is the exact same hardware and flickering as in LP: #1554613
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https://bugs.launchpad.net/bugs/1561729
Title:
[drm:intel_cpu_fifo_underrun_irq_handler [i915_bpo]]
introduced in LP: #1540390
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Title:
screen flickering on XPS13 9350
Status in linux package in Ubuntu:
Confirmed
Bug
Christopher: OK sorry about that. The bisections just takes such a
sh***load of times it seems unfair/unreasonable to ask it to be done
again unless you're certain the cause is different.
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Christopher: This issue is identified and awaiting on upstream for a fix; Why
waste your user's time by opening a new issue on LP or by asking for yet
another bisect? It is not going to make the fix come faster.
LP: #1540390
LP: #1554613
https://bugs.freedesktop.org/show_bug.cgi?id=94593
** Bug
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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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
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:
** 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
I believe that this backport is causing screen flickering problems on
Dell XPS13 9350, c.f. LP: #1554613 (where you'll find a bisect log
pointing to this backport, and dmesg msg on first error)
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4.5.0-997-generic #201603142201 from drm-intel-next still shows
flickering
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Title:
Backport more recent driver for SKL, KBL and BXT
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've filed https://bugs.freedesktop.org/show_bug.cgi?id=94593 . After
bisecting the intel-drm-next branch I believe
921ec285a6589cf3beb7f56a70744f75b09349f8 to be the culprit.
** Bug watch added: freedesktop.org Bugzilla #94593
https://bugs.freedesktop.org/show_bug.cgi?id=94593
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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.
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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** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
screen
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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Public bug reported:
see #1552304
does not affect 4.4.0-8
affects 4.4.0-9 to 4.4.0-11
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 x86_64
ApportVersion: 2.20-0ubuntu3
Christopher: I've opened #1554613
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Title:
screen flicker on Dell XPS 13 9350 after kernel upgrade
Status in linux package in
Christopher, I'm not sure I understand your request. I /am/ using the
ubuntu repository kernel:
Linux tbonfort-XPS-13-9350 4.4.0-8-generic #23-Ubuntu SMP Wed Feb 24
20:45:30 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
I gave references to the kernel-ppa versions for reference.
Do you still want me
Issue is still present in 4.4.0-11-generic
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Title:
screen flicker on Dell XPS 13 9350 after kernel upgrade
Status in linux package
I am using BIOS 1.2.3 and confirm the issue is not solved with the
update
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Title:
screen flicker on Dell XPS 13 9350 after kernel
issue is still present on 4.4.0-10-generic
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Title:
screen flicker on Dell XPS 13 9350 after kernel upgrade
Status in linux package
4.4.3 from the kernel ppa does not exhibit this bug
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Title:
screen flicker on Dell XPS 13 9350 after kernel upgrade
Status in
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