(In reply to Mario Limonciello (AMD) from comment #101) > Those of you that can still reproduce this, does reverting > https://github.com/torvalds/linux/commit/ > 4dbd11796f3a8eb95647507befc41995458a4023 change anything? That commit is > correct so we wouldn't revert it in mainline, but it might give a hint that > there are multiple timing problems. > > Please give it a solid shake out (at least 10 cycles that you unplug power > adapter during suspend) before reporting back.
Hi Mario, I tested reverting commit 4dbd11796f3a on my HP Zbook Firefly G10 with a Ryzen 7 PRO 7840HS, as you suggested. Result: The problem was resolved. I performed the test cycle more than 10 times and the CPU frequency scaled normally after every single resume. Before the revert, the problem would consistently occur during the test cycle described below: 1) Laptop in use plugged on HP charger (any power profile) 2) Close lid of laptop 3) Unplug HP charger 4) Wait a few seconds 5) Plug in HP charger 6) Open Laptop - See that the CPU is stuck at 544 Hz. 7) Unplug and plug the charger makes the frequency normal again at a minimum of 1101 Hz but scaling normally. My system details: - Model: HP Zbook Firefly 14 inch G10 A (SBKPF,SBKPFV2) - CPU: AMD Ryzen 7 PRO 7840HS - BIOS: V82 Ver. 01.09.00 - OS: Fedora Silverblue 42 Thank you for your help. Márcio -- 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: Invalid 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/linux/+bug/2088733/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
