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Once every few weeks or so, my computer will randomly crash. The monitor will start to rapidly flash different colors for about 30 seconds (I have a video of this, but I'm not sure if the precise details is helpful), and then the computer will power off. The most recent entries to journalctl is included below:
Jul 12 13:09:50 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:09:50 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:09:52 sburb thinkfan[279]: Temperatures(bias): 73(0) -> level 7
Jul 12 13:09:54 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:09:54 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:09:55 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:09:55 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:09:55 sburb rtkit-daemon[490]: Successfully made thread 1949 of process 1301 owned by '1000' RT at priority 10.
Jul 12 13:09:55 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:09:57 sburb thinkfan[279]: Temperatures(bias): 78(0) -> level 127
Jul 12 13:10:02 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:10:02 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:10:33 sburb wpa_supplicant[379]: wlp3s0: PMKSA-CACHE-ADDED 38:17:c3:8f:91:c1 0
Jul 12 13:10:33 sburb wpa_supplicant[379]: wlp3s0: PMKSA-CACHE-ADDED 38:17:c3:8f:79:b1 0
Jul 12 13:10:33 sburb wpa_supplicant[379]: wlp3s0: PMKSA-CACHE-ADDED 38:17:c3:8f:79:a1 0
Jul 12 13:10:33 sburb wpa_supplicant[379]: wlp3s0: PMKSA-CACHE-ADDED 90:4c:81:83:a6:b1 0
Jul 12 13:10:33 sburb wpa_supplicant[379]: wlp3s0: PMKSA-CACHE-ADDED 00:4e:35:71:fb:21 0
Jul 12 13:10:33 sburb wpa_supplicant[379]: wlp3s0: PMKSA-CACHE-ADDED 48:4a:e9:aa:31:11 0
Jul 12 13:10:39 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:10:39 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:10:39 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:10:39 sburb rtkit-daemon[490]: Supervising 8 threads of 6 processes of 1 users.
Jul 12 13:10:39 sburb rtkit-daemon[490]: Successfully made thread 2161 of process 2011 owned by '1000' RT at priority 10.
Jul 12 13:10:39 sburb rtkit-daemon[490]: Supervising 9 threads of 7 processes of 1 users.
Jul 12 13:11:10 sburb thinkfan[279]: Temperatures(bias): 71(0) -> level 7
Jul 12 13:11:44 sburb thinkfan[279]: Temperatures(bias): 78(0) -> level 127
Jul 12 13:11:58 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:11:58 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:11:59 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:11:59 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:12:10 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:12:10 sburb rtkit-daemon[490]: Supervising 7 threads of 5 processes of 1 users.
Jul 12 13:12:46 sburb kernel: powercap intel-rapl:0: package locked by BIOS, monitoring only
Jul 12 13:12:48 sburb kernel: intel_powerclamp: Start idle injection to reduce power
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #208!!!
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #208!!!
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #288!!!
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #288!!!
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #288!!!
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #288!!!
Jul 12 13:12:49 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #288!!!
Jul 12 13:12:49 sburb kernel: intel_powerclamp: Stop forced idle injection
Jul 12 13:12:50 sburb kernel: intel_powerclamp: Start idle injection to reduce power
Jul 12 13:12:51 sburb kernel: intel_powerclamp: Stop forced idle injection
Jul 12 13:12:52 sburb kernel: intel_powerclamp: Start idle injection to reduce power
Jul 12 13:12:57 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #202!!!
Jul 12 13:12:57 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #202!!!
Jul 12 13:12:57 sburb kernel: NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #202!!!
Jul 12 13:13:01 sburb kernel: intel_powerclamp: Stop forced idle injection
Jul 12 13:13:02 sburb kernel: intel_powerclamp: Start idle injection to reduce power
Jul 12 13:13:19 sburb kernel: intel_powerclamp: Stop forced idle injection
Jul 12 13:13:20 sburb kernel: intel_powerclamp: Start idle injection to reduce power
Jul 12 13:13:21 sburb kernel: intel_powerclamp: Stop forced idle injection
Jul 12 13:13:24 sburb kernel: intel_powerclamp: Start idle injection to reduce powerI'm not really seeing anything here that could be of use (my impression after googling is that the tick-stop errors are innocent). Running 5.12.13-arch1-2 on a Thinkpad T420s, although this problem has persisted for at least a year, with varying degrees of frequency.
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