I'm unsure if this is really fixed in Jammy
I'm seeing flickering with 5.15.0-41 as well which seems to improve with
i915.enable_dc=0 intel_idle.max_cstate=2
cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-5.15.0-41-generic root=/dev/mapper/vgubuntu-root ro quiet
splash i915.enable_dc=0 intel_idle.max_cstate=2 vt.handoff=7
sudo lshw -c display
*-display
description: VGA compatible controller
product: TU117GLM [Quadro T2000 Mobile / Max-Q]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:205 memory:ad000000-adffffff memory:80000000-8fffffff
memory:90000000-91ffffff ioport:3000(size=128) memory:ae080000-ae0fffff
*-display
description: VGA compatible controller
product: CometLake-H GT2 [UHD Graphics]
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
logical name: /dev/fb0
version: 05
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
configuration: depth=32 driver=i915 latency=0 mode=1920x1080
resolution=1920,1080 visual=truecolor xres=1920 yres=1080
resources: iomemory:600-5ff iomemory:400-3ff irq:185
memory:6040000000-6040ffffff memory:4000000000-400fffffff ioport:4000(size=64)
memory:c0000-dffff
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https://bugs.launchpad.net/bugs/1958191
Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
intel_idle.max_cstate=2 are added) (fixed in 5.17.7 and later)
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Jammy:
Fix Released
Status in linux source package in Kinetic:
Triaged
Bug description:
Ubuntu 22.04 development branch on kernel 5.15.0-17-generic @
18/1/2022
Booting into desktop gets heavy screen flickering and disforming (unusable)
both booting on xorg and wayland
on kernel 5.13 it did not occur so heavy (only little glitches once in
a while see bug 1948778)
adding the kernel paramater intel_idle.max_cstate=4 fixed this
i had these same bugs on this machine before:
https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1838644
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1948778
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-17-generic 5.15.0-17.17
ProcVersionSignature: Ubuntu 5.15.0-17.17-generic 5.15.12
Uname: Linux 5.15.0-17-generic x86_64
ApportVersion: 2.20.11-0ubuntu75
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: lotuspsychje 1201 F.... pipewire-media-
lotuspsychje 1207 F.... pulseaudio
/dev/snd/seq: lotuspsychje 1193 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 18 04:22:00 2022
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth
Adapter
Bus 001 Device 003: ID 04f2:b59e Chicony Electronics Co., Ltd Chicony USB2.0
Camera
Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Notebook N7x0WU
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-17-generic
root=UUID=a41247d1-3bc3-453e-849a-e07fdcca6201 ro quiet splash
intel_idle.max_cstate=4 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.15.0-17-generic N/A
linux-backports-modules-5.15.0-17-generic N/A
linux-firmware 1.204
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/07/2019
dmi.bios.release: 7.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 7.13
dmi.board.asset.tag: Tag 12345
dmi.board.name: N7x0WU
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.ec.firmware.release: 7.14
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr7.13:bd01/07/2019:br7.13:efr7.14:svnNotebook:pnN7x0WU:pvrNotApplicable:rvnNotebook:rnN7x0WU:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:skuNotApplicable:
dmi.product.family: Not Applicable
dmi.product.name: N7x0WU
dmi.product.sku: Not Applicable
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook
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