Single CPU 100% by lspci

Question

On Fedora, the lspci command keeps staying at ~100% while I'm not doing anything with my computer. I've done a clean install last week and before that I also had this problem.

Top output gives me:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND     
10283 tim       20   0   19384   1436   1312 R 100.0  0.0  14:34.63 lspci       
 1752 tim       20   0  624948 144552 109544 S   8.0  1.8   3:49.61 Xorg        
11197 tim       20   0  612712  48612  36336 S   2.0  0.6   0:18.19 gnome-syst+ 
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and if I check system monitor, i see that only 1 cpu running at ~100%.

Besides, if I try to run the command 'lspci' it just keeps loading and not showing anything.

Some info about my system:

Fedora 27 (up-to-date)
Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
Core(s) per socket:  4
RAM memory: 8G

Answer 1

You have to figure which process invokes lspci. Replace lspci binary with script. Rename it to lspci.bin (issue commands below as root user):

mv /usr/bin/lspci /usr/bin/lspci.bin

Create script:

touch /usr/bin/lspci

Make it executable:

chmod +x /usr/bin/lspci

Open created script with your favorite text editor (let it be nano for instance)

nano /usr/bin/lspci

and copy/paste the following code:

#!/bin/sh
echo lspci "$@" >> /var/log/lspci.log
date >> /var/log/lspci.log
pstree >> /var/log/lspci.log
exec lspci.bin "$@"

Reboot computer, check if the lspci CPU overload problem exists, open the log file /var/log/lspci.log and try to explain whats happened. If you can't find a reason of the problem, post the content of the log and ask for additional support.

If the problem has gone away, revert back everything:

rm -f /usr/bin/lspci
mv /usr/bin/lspci.bin /usr/bin/lspci
rm -f /var/log/lspci.log
reboot