** Description changed: - I have hyperthreading disabled on my Ubuntu 20.04 machine, which makes + I have hyperthreading disabled on my Ubuntu 19.10 machine, which makes some processors in /sys/devices/system/cpu/cpu* have their "online" set to 0. However, when the for-loop in /lib/systemd/set-cpufreq iterates over the processors, it doesn't check if the processor is online before trying to write the governor name into scaling_governor. + + The script appears to have the same bug in Ubuntu 20.04. I modified the script to print the cpu it is trying to set before doing so, and I get the following: Setting powersave scheduler for all CPUs /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor /sys/devices/system/cpu/cpu10/cpufreq/scaling_governor /lib/systemd/set-cpufreq: 43: echo: echo: I/O error Since the script doesn't continue to try other processors in the loop, it means that only cpu0 and cpu1 on my machine get set to powersave and the others remain with the performance governor. The cpufreq-info command confirms this. Checking if the processor has online==1 before writing, or putting the echo within a "set +e" "set -e" pair would fix the problem (although the latter approach would still print error messages).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1889668 Title: set-cpufreq error when cpu is offline To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1889668/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
