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I am using ubuntu 22.04.4 and I've noticed that after upgrading to this current version that the machine runs extremely slow from 22.04.2.

The base CPU clock always goes down to the minimum and causes the computer to lag.
Any idea what changed that could of made this issue occur?
I have attached some screen shots for reference.

CPU info:

CPU GHz

System info:

system information

Edit 1:

enter image description here

Edit 2:

When running the task: taskset -c 0 yes > /dev/null

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
5500000

When not running the task: taskset -c 0 yes > /dev/null

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
800000
Will H.
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  • anyone have an idea about this? – Will H. Apr 10 '24 at 23:35
  • Which CPU frequency scaling driver are you using? Do: grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver . Which CPU frequency scaling governor are you using? Do grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor. Some other useful info might be grep . /sys/devices/system/cpu/cpu0/cpufreq/* and (if intel_pstate driver) grep . /sys/devices/system/cpu/intel_pstate/* – Doug Smythies Apr 11 '24 at 00:17
  • I'm having the same issue of an extremely slow/laggy UI. My CPU is a i5-13600K. The scaling_governor is reported to be "powersave" for all cores, altough power settings are set to performance in the GUI. I can not confirm the low clock speed though. My cores are at a steady 3.5Ghz with occasional boosts according to watch -n.1 "cat /proc/cpuinfo | grep \"^[c]pu MHz\"". Any new insights? – Fitzi Apr 15 '24 at 13:57
  • @Fitzi : Please start your own question and include the information I asked for in my comment. Also include the kernel version and the output from grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq. Your issue doesn't sound like low CPU frequency is the cause. – Doug Smythies Apr 15 '24 at 14:08
  • @DougSmythies

    /sys/devices/system/cpu/cpu9/cpufreq/scaling_driver:intel_pstate

    /sys/devices/system/cpu/cpu9/cpufreq/scaling_governor:powersave

    Odd thing is I don't have powersave selected on my power option

    /sys/devices/system/cpu/intel_pstate/hwp_dynamic_boost:0 /sys/devices/system/cpu/intel_pstate/max_perf_pct:100 /sys/devices/system/cpu/intel_pstate/min_perf_pct:14 /sys/devices/system/cpu/intel_pstate/no_turbo:0 /sys/devices/system/cpu/intel_pstate/status:active

     – Will H. Apr 17 '24 at 00:04
  • The powersave governor with the intel_pstate driver is similar to the ondemand governor for the intel_cpufreq driver. Please edit your question adding all the information I asked for in my earlier comments, both to you and to Fitzi. – Doug Smythies Apr 17 '24 at 14:18
  • @DougSmythies done and edited – Will H. Apr 18 '24 at 20:16
  • To see of the CPU frequency is being throttled, let's do a specific test: In one terminal do taskset -c 0 yes > /dev/null and while that is running in another terminal do cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq. Edit your question adding the text of the results, not as screen shots. – Doug Smythies Apr 20 '24 at 20:08
  • @DougSmythies

    Edit 2 done as requested.

    Could this be related to the linux kernal being upgrade to 6.5.0?

    Can you explain why the GUI that changes the power modes would be reflected in the governor?

     – Will H. Apr 22 '24 at 00:47
  • Under full load a CPU, cpu 0 in this test case, scales its frequency up to 5.5 GHz as expected. And it idles down to 0.8 GHz with the load removed, also as expected. Everything seems normal. – Doug Smythies Apr 22 '24 at 05:05
  • So powersave works but if I want performance governor at all times because it raises the idle. How do I change that @DougSmythies – Will H. Apr 23 '24 at 08:42
  • echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor will change the governor, but the change will not persist across re-boots. There are utilities for taking care of things across re-boots, but I don't use them. Note that even with the performance governor the processor itself can reduce the CPU frequency if the load is light enough. – Doug Smythies Apr 23 '24 at 13:53
  • @DougSmythies so the GUI interface on the power options doesn't affect cpu scaling? – Will H. Apr 26 '24 at 00:49
  • I don't know, I am a server person and do not use any GUI stuff. – Doug Smythies Apr 26 '24 at 18:59

0 Answers0