My problem in one picture :
The memory usage of xorg as a child process of sddm keeps growing with time. Everytime I restart my computer, the problem reappears after a few dozens of minutes.
I tried to troubleshoot with the logfile but it seems to be empty. I did not find an answer in the similar questions I did consult (most of them several years old)
Do you have any idea ?
I'm running Kubuntu 18.10.
top - 15:17:36 up 1:59, 1 user, load average: 0,97, 1,07, 1,04
Tasks: 311 total, 1 running, 310 sleeping, 0 stopped, 0 zombie
%Cpu(s): 2,1 us, 1,9 sy, 0,0 ni, 95,6 id, 0,0 wa, 0,0 hi, 0,4 si, 0,0 st
MiB Mem : 15890,9 total, 4239,6 free, 4370,2 used, 7281,1 buff/cache
MiB Swap: 2048,0 total, 2048,0 free, 0,0 used. 7138,1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
935 root 20 0 5335156 3,7g 3,5g S 2,0 23,7 12:43.05 Xorg
11325 jerome 20 0 1949572 480928 192236 S 9,3 3,0 3:34.33 slack
5344 jerome 20 0 2079560 461944 160196 S 1,0 2,8 3:06.75 Web Content
2717 jerome 20 0 2902428 443580 176668 S 8,6 2,7 21:13.66 firefox
pmap -qx $(pgrep Xorg)
>> 935: /usr/lib/xorg/Xorg -nolisten tcp -auth /var/run/sddm/{06d4bda6-5612-4561-ac5c-375bd3132074} -background none -noreset -displayfd 17 -seat seat0 vt1
ps -o ppid= -p 935
>> 933
pmap -qx $(pgrep sddm)
>> 933: /usr/bin/sddm
