Created attachment 134029 [details] Syslog just prior to crash SUMMARY Random freeze of computer, keyboard and mouse lockup, not associated with any particular activity, hard system reset is only option, has occurred since installation of OS approximately 6 months ago STEPS TO REPRODUCE 1. This is random and has not been noted to have any particular precursor 2. 3. OBSERVED RESULT System Lockup, hard reset required, REISUB or any other soft recovery not available b/c I/O lockup EXPECTED RESULT SOFTWARE/OS VERSIONS Linux/KDE Plasma: 5.4.0-56-generic (available in About System) KDE Plasma Version: 5.12.9 KDE Frameworks Version: 5.44.0 Qt Version: 5.9.5 ADDITIONAL INFORMATION
Created attachment 134030 [details] 12/12/2020 Second Freeze of the Day Second freeze of the day occurred, noted that the freeze typically begins with a mouse cursor jitter, delayed responses to mouse movement in cursor, then a couple of short freezes of cursor followed by total system freeze, attempt to recover by use of AltCtrlF2 resulted in system reboot, see syslog entries around 0734
Created attachment 134032 [details] Third Freeze of the day, 12/11/2020 Was able to execute REISUB although CtlAltF2 failed to present virtual terminal
Created attachment 134036 [details] Fourth Freeze of the day This time had time to invoke REISUB when I noticed jittery mouse movements
Changed X driver from Nouveau to NVidia 3.40(recommended driver) today and have had 8 freeze ups in less than one hours usage. REISUB is my only friend. 16.04 was rock solid on this same hardware, 18.04 is just a rock. Come on guys, please help.
This is almost certainly not a KDE-related issue, but either way, Plasma 5.12 is no longer supported; the latest LTS version is 5.18. You can get it on Ubuntu/Kubuntu 20.04. I would recommend upgrading to that or a newer release to see if that helps.
Respectfully, almost and certainly are never congruent. This issue began with the installation of 18.04 on a machine where 16.04 was rock solid. There have been no hardware changes. 18.04 is currently listed on kde.org as LTS until 04/2021. The issue is real, repetitive and clearly related to installation of software. My policy on OS is to avoid the newest because of issues just like this...if it ain't broke... Currently I am using Nouveau b/c Nvidia proprietary driver is plagued with hourly freeze ups. On 16.04, the instability was more pronounced with Nouveau and I could only use Nvidia. Not related to Plasma just does not pass a sniff test.