Daniel,
This commit is backported from v5.6-rc1, so groovy is not affected.
It'd help to clarify other flicker issues with "ice-lake-flicker" if those bug
reporters could try this test kernel.
Thidau,
It looks like you encountered other issues, please file another bug
report if you could reproduce it regularly.
Hossein,
Glad to hear it works for you.
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
** Also affects: linux-oem-osp1 (Ubuntu Eoan)
Importance: Undecided
Status: New
** No longer affects: linux-oem-osp1 (Ubuntu Eoan)
** Changed in: linux (Ubuntu Eoan)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1875254
Title:
Intermittent display blackouts on event
Status in HWE Next:
New
Status in linux package in Ubuntu:
Invalid
Status in linux-oem-osp1 package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Invalid
Status in linux-oem-osp1 source package in Bionic:
Fix Committed
Status in linux source package in Eoan:
In Progress
Status in linux source package in Focal:
In Progress
Status in linux-oem-osp1 source package in Focal:
Invalid
Bug description:
[Impact]
When audio device enters runpm D3(idle for 7 seconds) and then wakes it up to
make a sound, it flicks the screen.
This behavior could be observed while plug/remove AC cable or USB disk, or
open a terminal and press backsapce key.
[Fix]
This issue could be fixed by this commit, it fixes the flicker during
boot-time, but it also fixes the flicker during rumtime wakeup.
1ee48a61aa57 drm/i915: Limit audio CDCLK>=2*BCLK constraint back to GLK only
Audio drivers communicate with i915 over HDA bus multiple times during system
boot-up and each of these transactions result in matching
get_power/put_power calls to i915, and depending on the platform,
a modeset change causing visible flicker.
GLK is the only platform with minimum CDCLK significantly lower
than BCLK, and thus for GLK setting a higher CDCLK is mandatory.
For other platforms, minimum CDCLK is close but below 2*BCLK
(e.g. on ICL, CDCLK=176.4kHz with BCLK=96kHz). Spec-wise the constraint
should be set, but in practise no communication errors have been
reported and the downside if set is the flicker observed at boot-time.
[Test]
Verified on Dell XPS 13 9300
[Regression Potential]
Low, it fixes below commit which contains in ubuntu kernel and should have
been applied on ubuntu kernel, too.
Fixes: f6ec9483091f ("drm/i915: extend audio CDCLK>=2*BCLK constraint to more
platforms")
=========================================
Issues with the screen going black for a second on certain events on a dell
XPS 9370 2 in 1, especially when on battery.
Seems to be a known bug in arch
(https://wiki.archlinux.org/index.php/Dell_XPS_13_2-in-1_(7390)).
Last 5.6.7 kernel tested and the issues has disappears but pb with sound card.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: lucie 2232 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-04-25 (1 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Dell Inc. XPS 13 7390 2-in-1
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fr_FR.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-26-generic
root=UUID=056fd229-d014-4b3b-a581-1b646105d1ed ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
RelatedPackageVersions:
linux-restricted-modules-5.4.0-26-generic N/A
linux-backports-modules-5.4.0-26-generic N/A
linux-firmware 1.187
Tags: focal
Uname: Linux 5.4.0-26-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 03/02/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.1
dmi.board.name: 06CDVY
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 31
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.3.1:bd03/02/2020:svnDellInc.:pnXPS1373902-in-1:pvr:rvnDellInc.:rn06CDVY:rvrA00:cvnDellInc.:ct31:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 7390 2-in-1
dmi.product.sku: 08B0
dmi.sys.vendor: Dell Inc.
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