Intermittent display blackouts on event
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
OEM Priority Project |
Fix Released
|
Undecided
|
Leon Liao | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Invalid
|
Undecided
|
Unassigned | ||
Eoan |
Fix Released
|
Medium
|
Unassigned | ||
Focal |
Fix Released
|
High
|
AceLan Kao | ||
linux-oem-osp1 (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Focal |
Invalid
|
Undecided
|
Unassigned |
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:/
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/
CasperMD5CheckR
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-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=fr_FR.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
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.
dmi.product.family: XPS
dmi.product.name: XPS 13 7390 2-in-1
dmi.product.sku: 08B0
dmi.sys.vendor: Dell Inc.
CVE References
Changed in linux (Ubuntu Focal): | |
assignee: | nobody → AceLan Kao (acelankao) |
status: | New → In Progress |
description: | updated |
Changed in linux (Ubuntu): | |
status: | Invalid → Confirmed |
Changed in linux (Ubuntu Focal): | |
importance: | Undecided → High |
Changed in linux (Ubuntu Bionic): | |
status: | New → Invalid |
Changed in linux-oem-osp1 (Ubuntu Focal): | |
status: | New → Invalid |
Changed in linux-oem-osp1 (Ubuntu): | |
status: | New → Invalid |
Changed in linux-oem-osp1 (Ubuntu Bionic): | |
status: | New → Fix Committed |
tags: | added: originate-from-1874220 |
Changed in linux (Ubuntu Eoan): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Eoan): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Focal): | |
status: | In Progress → Fix Committed |
Changed in oem-priority: | |
assignee: | nobody → Leon Liao (lihow731) |
Changed in oem-priority: | |
status: | New → Fix Released |
Changed in hwe-next: | |
status: | New → Fix Released |
version ubuntu 20.04, kernel 5.4.0-26