https://bugs.kde.org/show_bug.cgi?id=431799

            Bug ID: 431799
           Summary: System freezes for a while after login
           Product: plasmashell
           Version: 5.20.5
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: 1.0

SUMMARY
KDE Neon freezes immediately after the shell loads. This problem is present on
both the live image which one uses for installation and also on an installed
copy of the system. I have three computers and two of them use traditional SSDs
while one uses a NVM disk. Only the one with the NVM disk is affected by this
issue. Other Linux based operating systems do not have this bug (I've tried
Debian, Ubuntu, Linux Mint, and Pop-Os).

Every time I see this issue, I see the following two lines in /var/log/syslog:

Jan 18 20:59:39 surfneon kernel: [   82.993927] nvme nvme0: I/O 28 QID 0
timeout, reset controller
Jan 18 21:00:40 surfneon kernel: [  144.468852] nvme nvme0: 4/0/0
default/read/poll queues

STEPS TO REPRODUCE
1. Boot KDE Neon on an NVM disk machine (in this case a Microsoft Surface
Book2).
2. Wait for a bit.

OBSERVED RESULT
System freezes. The mouse moves but the system does not respond to clicks,
typing, or touch input. However, none of these inputs are lost. They get
replayed as soon as the system responds again.

EXPECTED RESULT
This should not happen.

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.20
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.10.7-surface [problem present with all kernels not just this
one including the stock kernel shipped with KDE Neon. You can reproduce this
bug using official live images too.]
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-7300U CPU @ 2.60GHz
Memory: 7.7 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 620

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