HDMI refresh rate at 4K 144Hz can't be set

[qihouji]

in the setting,when i set a refresh rate>60Hz, there will be a black screen for about half a minute and the refresh rate is automatically reset to 60Hz.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-47.51-generic 5.15.46
Uname: Linux 5.15.0-47-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.gpus.0000.0d.00.0: Error: path was not a regular file.
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 515.65.01 Wed Jul 20 14:00:58 UTC 2022
 GCC version:
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckMismatches: ./casper/filesystem.squashfs
CasperMD5CheckResult: fail
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 19 23:41:05 2022
DistUpgraded: Fresh install
DistroCodename: jammy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation GA102 [GeForce RTX 3080 Ti] [10de:2208] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd GA102 [GeForce RTX 3080 Ti] [1458:4081]
InstallationDate: Installed on 2022-08-22 (27 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
MachineType: Gigabyte Technology Co., Ltd. X570 AORUS MASTER
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-47-generic root=UUID=00c387f2-1035-4d26-a66d-d9bcc66f1b7b ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/12/2022
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F36e
dmi.board.asset.tag: Default string
dmi.board.name: X570 AORUS MASTER
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrF36e:bd05/12/2022:br5.17:svnGigabyteTechnologyCo.,Ltd.:pnX570AORUSMASTER:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnX570AORUSMASTER:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:
dmi.product.family: X570 MB
dmi.product.name: X570 AORUS MASTER
dmi.product.sku: Default string
dmi.product.version: -CF
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.110-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 22.0.5-0ubuntu0.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

This appears to be either a hardware problem or a bug in the Nvidia driver. I think most likely it's due to insufficient HDMI cable bandwidth. Please ensure you are using an HDMI 2.1 certified cable capable of at least 40 Gbit/s. An HDMI 2.0 cable will not be good enough.

[qihouji (qhjll)]

Im sure it's an HDMI 2.1 cable because this cable can reach 4k 144hz when using Windows.Is there something wrong with my settings？

[Daniel van Vugt (vanvugt)]

Please try:

1. Open Settings.

2. Open a Terminal and run:

   journalctl -f > logtail.txt

3. In Settings, try to set the refresh rate to 144Hz.

4. When the screen returns, press Ctrl+C in the Terminal window.

5. Attach the resulting text file here.

[qihouji (qhjll)]

This is the log file when bug happens.
Thanks.

[Daniel van Vugt (vanvugt)]

Thanks. The log seems to confirm the monitor rejected the 144Hz mode and then the system reverted back to 60Hz after 20 seconds. So it seems like this is either an Nvidia driver problem (incompatible mode definition?) or insufficient bandwidth in the connection to the monitor.

Did you define the 144Hz mode yourself or was it always offered in Settings?

[Launchpad Janitor (janitor)]

[Expired for nvidia-graphics-drivers-515 (Ubuntu) because there has been no activity for 60 days.]