I've made the same tests with mainline kernel '5.12.4-051204-generic #202105140931 SMP Fri May 14 09:35:44 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux' and the results are the same, i.e. sensors command stopping when reaching amd section and this error message showing in dmesg:
[ 65.636330] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000). [ 67.104101] [drm:dce110_edp_wait_for_hpd_ready [amdgpu]] *ERROR* dce110_edp_wait_for_hpd_ready: wait timed out! [ 67.704167] [drm:dce110_edp_wait_for_hpd_ready [amdgpu]] *ERROR* dce110_edp_wait_for_hpd_ready: wait timed out! [ 67.735924] [drm] UVD and UVD ENC initialized successfully. [ 67.845908] [drm] VCE initialized successfully. [ 67.850738] amdgpu 0000:01:00.0: [drm] Cannot find any crtc or sizes [ 68.144823] drm_dp_i2c_do_msg: 2 callbacks suppressed [ 68.241327] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon [ 68.241388] [drm:lspcon_resume [i915]] *ERROR* LSPCON init failed on port D [ 68.893269] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon [ 68.893321] [drm:lspcon_resume [i915]] *ERROR* LSPCON init failed on port D So the problem is not Ubuntu related. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1910562 Title: Fans switching on and off every 10 seconds after update to kernel 5.8.0-34 Status in linux package in Ubuntu: Incomplete Status in linux-signed-hwe-5.8 package in Ubuntu: Confirmed Status in lm-sensors package in Ubuntu: New Status in xserver-xorg-video-amdgpu package in Ubuntu: Invalid Bug description: After updating via apt dist-upgrade from kernel 5.4.0-59 to kernel 5.8.0-34 the fan on my machine started switching on (for an instant) and off every 10 seconds even when idle with CPU at 48/50°C. Switching back to previous kernel solves temporary the problem, i.e. fans are always off with light desktop work. The new behavior is really annoying and I guess not healthy for the fans. I'm on latest Dell bios, with every other package updated. Di something in the thermal policies change between those two kernels? Is it possible to go back to previous behavior ? Thanks in advance for help Machine: Dell Precison 7540, intel i7-9750 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.8.0-34-generic 5.8.0-34.37~20.04.2 ProcVersionSignature: Ubuntu 5.8.0-34.37~20.04.2-generic 5.8.18 Uname: Linux 5.8.0-34-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.14 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu Jan 7 17:14:54 2021 InstallationDate: Installed on 2020-05-06 (246 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: linux-signed-hwe-5.8 UpgradeStatus: No upgrade log present (probably fresh install) --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gabriele 2370 F.... pulseaudio /dev/snd/controlC1: gabriele 2370 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-05-06 (352 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: Dell Inc. Precision 7540 Package: lm-sensors 1:3.6.0-2ubuntu1 PackageArchitecture: amd64 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-50-generic root=UUID=c39f518b-f5c9-47c5-8e7f-42d970d2dedb ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18 RelatedPackageVersions: linux-restricted-modules-5.8.0-50-generic N/A linux-backports-modules-5.8.0-50-generic N/A linux-firmware 1.187.11 Tags: focal Uname: Linux 5.8.0-50-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dialout dip docker lpadmin lxd plugdev sambashare sudo vboxusers wireshark _MarkForUpload: True dmi.bios.date: 01/08/2021 dmi.bios.release: 1.11 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.11.2 dmi.board.name: 0XMC3F dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.11.2:bd01/08/2021:br1.11:svnDellInc.:pnPrecision7540:pvr:rvnDellInc.:rn0XMC3F:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Precision dmi.product.name: Precision 7540 dmi.product.sku: 0926 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1910562/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
