Hi, I'm also hit by this issue and I'm having the same laptop and CPU as this comment https://bugzilla.kernel.org/show_bug.cgi?id=218305#c84. In that similar bug report, it appears that a patch was already submitted - https://lore.kernel.org/platform-driver-x86/70dfa642-4c97-4aaf-aa79-70127974f...@amd.com/T/#e174cfe2f4ec5893e39cff6994a93ebd499ec29e7 . The patch is very simple (three lines of code).
I'm heavily relying on the suspend/resume feature, so the question is: how quickly can the patch be applied and backported to the latest Ubuntu LTS 24.04? Meanwhile, since I'm on the brink of switching to Windows, I'll try to apply the patch to a local custom kernel build! Thanks! ** Bug watch added: Linux Kernel Bug Tracker #218305 https://bugzilla.kernel.org/show_bug.cgi?id=218305 -- 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/2088733 Title: low CPU frequency after wake up AMD Ryzen Status in linux package in Ubuntu: Confirmed Bug description: After wake up I can see at least once a week issue with CPU frequency not going up. When running: $ watch lscpu -e=CPU,MHZ standard output looks like: CPU MHZ 0 400.0000 1 1383.2480 2 400.0000 3 400.0000 4 400.0000 5 2699.7561 6 1288.0500 7 400.0000 8 400.0000 9 400.0000 10 400.0000 11 400.0000 12 3244.0720 13 400.0000 14 400.0000 15 1295.9050 while when the issue occurs, I can't see 600 Mhz or higher values in the same graph. Which also means that response time of computer is much lower and everything feels lazy. Restart fixes the issue or plug power cable off and in again. My CPU is AMD Ryzen™ 7 PRO 7840HS w/ Radeon™ 780M Graphics × 16 My kernel version: 6.8.0-48-generic #48-Ubuntu SMP PREEMPT_DYNAMIC Fri Sep 27 14:04:52 UTC 2024 OS version: Ubuntu 24.04.1 LTS My laptop: HP ZBook Firefly 14 inch G10 A Mobile Workstation PC I know about one more person with same machine type with the issue and there is also this question on askubuntu which says there is third person with this issue. https://askubuntu.com/questions/1531956/cpu-too-slow-after-waking-up- in-ubuntu-24-04-1 This bug looks pretty similar however should be fixed already, so creating new one https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.19/+bug/2007718 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2088733/+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
