[comet lake] Screen is scrambled/distored and flickers

Bug #1863603 reported by Jimisola Laursen
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
New
Undecided
Unassigned

Bug Description

The screen is distorted/scrambled every now and then. That is, it's like a few lines of pixels are repeated (so it's a normally a blur). The screen also flickers at times. This happens a few times a few. I've noticed that if I close the lid and let the screen dim/blank/suspend then normally is goes back to normal when it wakes up.

To my knowledge his happens irrespective of what programs I use at the time.

Dell XPS 13 (7390).

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
Uname: Linux 5.3.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Mon Feb 17 12:32:42 2020
DistUpgraded: Fresh install
DistroCodename: eoan
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 6.0.14, 5.3.0-26-generic, x86_64: installed
 virtualbox, 6.0.14, 5.3.0-29-generic, x86_64: installed
GraphicsCard:
 Intel Corporation Device [8086:9b41] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0962]
InstallationDate: Installed on 2019-12-24 (54 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: Dell Inc. XPS 13 7390
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-29-generic root=UUID=c325f61e-5f45-4a7a-ada7-71dd6d7d4b42 ro resume=UUID=c325f61e-5f45-4a7a-ada7-71dd6d7d4b42 resume_offset=67694592 quiet splash mem_sleep_default=deep vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.0
dmi.board.name: 0G2D0W
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.2.0:bd10/03/2019:svnDellInc.:pnXPS137390:pvr:rvnDellInc.:rn0G2D0W:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 7390
dmi.product.sku: 0962
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.99-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.8-0ubuntu0~19.10.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

Revision history for this message
Jimisola Laursen (jimisola) wrote :
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Thanks for the bug report. This sounds like a kernel bug but are you able to provide additional photos of the bug under different conditions?

summary: - Screen is scrambled/distored and flickers
+ [comet lake] Screen is scrambled/distored and flickers
affects: xorg (Ubuntu) → linux (Ubuntu)
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Nevermind. It looks like bug 1855608 already describes the same issue so let's use that.

Revision history for this message
Jimisola Laursen (jimisola) wrote :

Daniel, thank you for the quick action.

It appeared last night again shortly after bootup (see attachment). I closed the lid and opened it again. Voila! Screen back to normal.

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

The EDID in Xrandr.txt decodes to:

Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 06 af 2d 5b 00 00 00 00 00 1c
version: 01 04
basic params: a5 1d 10 78 03
chroma info: ee 95 a3 54 4c 99 26 0f 50 54
established: 00 00 00
standard: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1: b4 37 80 a0 70 38 3e 40 3a 2a 35 00 25 a2 10 00 00 1a
descriptor 2: 90 2c 80 a0 70 38 3e 40 3a 2a 35 00 25 a2 10 00 00 1a
descriptor 3: 00 00 00 fe 00 30 36 56 47 36 81 42 31 33 33 48 41 4e
descriptor 4: 00 00 00 00 00 02 41 22 a8 01 11 00 00 0a 01 0a 20 20
extensions: 00
checksum: f0

Manufacturer: AUO Model 5b2d Serial Number 0
Made week 0 of 2018
EDID version: 1.4
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 29 cm x 16 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing is preferred timing
Supports GTF timings within operating range
Established timings supported:
Standard timings supported:
Detailed mode: Clock 142.600 MHz, 293 mm x 162 mm
               1920 1978 2020 2080 hborder 0
               1080 1083 1088 1142 vborder 0
               +hsync -vsync
Detailed mode: Clock 114.080 MHz, 293 mm x 162 mm
               1920 1978 2020 2080 hborder 0
               1080 1083 1088 1142 vborder 0
               +hsync -vsync
ASCII string: 06VG6
Manufacturer-specified data, tag 0
Checksum: 0xf0 (valid)
EDID block does NOT conform to EDID 1.3!
 Missing name descriptor
 Missing monitor ranges
 Detailed block string not properly terminated

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Not sure why the tool couldn't find it but it looks like the panel name is "B133HAN"

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