UPDATE:
After blacklisting nuoveau and installing nvidia driver, there was no overheat
shutdown, but the cpu is on full speed all the time. and the tempetature is 87
celsius constantly.
I tried disabling pstate, using tlp, neither worked so far.
Here is a usual frame from top:
top - 21:19:30 up 27 min, 1 user, load average: 2,84, 2,52, 2,26
Tasks: 251 total, 3 running, 197 sleeping, 0 stopped, 1 zombie
%Cpu(s): 65,2 us, 20,7 sy, 0,1 ni, 13,3 id, 0,1 wa, 0,0 hi, 0,7 si, 0,0 st
KiB Mem : 3780788 total, 152620 free, 2611464 used, 1016704 buff/cache
KiB Swap: 8000508 total, 7999228 free, 1280 used. 794276 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
275 root 20 0 227032 182460 3284 R 94,4 4,8 24:46.69
systemd-udevd
283 root 20 0 45892 5740 4568 R 16,7 0,2 5:12.21
systemd-udevd
758 root 20 0 1077448 26772 12596 S 11,1 0,7 1:48.09 snapd
4408 adtewa 20 0 52876 3992 3396 R 11,1 0,1 0:00.02 top
7 root 20 0 0 0 0 S 5,6 0,0 0:02.51 ksoftirqd/0
261 root 19 -1 164940 55772 54552 S 5,6 1,5 1:07.56
systemd-journal
1 root 20 0 159928 9212 6696 S 0,0 0,2 0:01.86 systemd
systemd-udevd is running near 100% all the time.
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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-nouveau in Ubuntu.
https://bugs.launchpad.net/bugs/1768976
Title:
Ubuntu 18.04 is overheating after upgrade from 16.04
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1768976/+subscriptions
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