Adding the kernel parameters to the grub configuration greatly reduces
the flicker on my Dell Precision 5480 running Ubuntu 22.04. However, it
returns every few seconds after the external display has gone to
standby, despite /sys/module/i915/parameters/enable_dc and
/sys/module/intel_idle/parameters/max_cstate still reporting their
updated values.
0000:00:02.0 VGA compatible controller: Intel Corporation Device a7a0 (rev 04)
(prog-if 00 [VGA controller])
Subsystem: Dell Device 0c40
Flags: bus master, fast devsel, latency 0, IRQ 213, IOMMU group 1
Memory at 607f000000 (64-bit, non-prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
I/O ports at 3000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] Process Address Space ID (PASID)
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] Page Request Interface (PRI)
Capabilities: [320] Single Root I/O Virtualization (SR-IOV)
Kernel driver in use: i915
Kernel modules: i915
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-hwe-6.2 in Ubuntu.
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:
Fix Released
Status in linux-hwe-5.19 package in Ubuntu:
Fix Released
Status in linux-hwe-6.2 package in Ubuntu:
Confirmed
Status in linux source package in Lunar:
Won't Fix
Status in linux-hwe-5.19 source package in Lunar:
Invalid
Status in linux-hwe-6.2 source package in Lunar:
Invalid
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 parameter i915.enable_dc=0 intel_idle.max_cstate=2
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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