ズームを使用していたところ、ラップトップの /var/log/syslog にこれらのメッセージが表示されました。Lenovo Thinkpad X220i で Ubuntu 19.10 を使用しています。カーネル バージョンは 5.3.0-42-generic です。
Mar 16 14:45:07 a thermald[617]: [WARN]sysfs write failed /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0/enabled
Mar 16 14:45:07 a kernel: [18300.593089] powercap intel-rapl:0: package locked by BIOS, monitoring only
Mar 16 14:45:07 a thermald[617]: [WARN]sysfs write failed /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0/constraint_0_power_limit_uw
Mar 16 14:45:12 a kernel: [18305.601751] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:45:12 a thermald[617]: [WARN]sysfs write failed /sys/devices/system/cpu/intel_pstate//no_turbo
Mar 16 14:45:21 a kernel: [18314.311822] mce: CPU1: Package temperature above threshold, cpu clock throttled (total events = 1)
Mar 16 14:45:21 a kernel: [18314.311826] mce: CPU0: Package temperature above threshold, cpu clock throttled (total events = 1)
Mar 16 14:45:21 a kernel: [18314.311832] mce: CPU2: Package temperature above threshold, cpu clock throttled (total events = 1)
Mar 16 14:45:21 a kernel: [18314.311835] mce: CPU3: Package temperature above threshold, cpu clock throttled (total events = 1)
Mar 16 14:45:21 a kernel: [18314.312809] mce: CPU3: Package temperature/speed normal
Mar 16 14:45:21 a kernel: [18314.312811] mce: CPU1: Package temperature/speed normal
Mar 16 14:45:21 a kernel: [18314.312813] mce: CPU0: Package temperature/speed normal
Mar 16 14:45:21 a kernel: [18314.312814] mce: CPU2: Package temperature/speed normal
Mar 16 14:45:22 a kernel: [18315.618828] intel_powerclamp: Start idle injection to reduce power
Mar 16 14:45:26 a kernel: [18319.812404] NOHZ: local_softirq_pending 01
Mar 16 14:45:27 a kernel: [18320.932256] NOHZ: local_softirq_pending 40
Mar 16 14:45:27 a kernel: [18320.936096] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.940073] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.940286] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.941296] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.942272] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.944073] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.946531] NOHZ: local_softirq_pending 02
Mar 16 14:45:27 a kernel: [18320.948072] NOHZ: local_softirq_pending 02
Mar 16 14:45:44 a kernel: [18337.857079] intel_powerclamp: Stop forced idle injection
Mar 16 14:45:44 a kernel: [18337.857608] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:45:52 a kernel: [18345.868126] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:46:02 a kernel: [18355.884437] intel_powerclamp: Start idle injection to reduce power
Mar 16 14:46:52 a kernel: [18406.269403] intel_powerclamp: Stop forced idle injection
Mar 16 14:46:52 a kernel: [18406.270253] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:46:55 a kernel: [18408.668109] perf: interrupt took too long (8008 > 7948), lowering kernel.perf_event_max_sample_rate to 24750
Mar 16 14:47:05 a kernel: [18418.285694] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:47:14 a kernel: [18427.302913] intel_powerclamp: Start idle injection to reduce power
Mar 16 14:50:08 a kernel: [18602.262278] perf: interrupt took too long (10329 > 10010), lowering kernel.perf_event_max_sample_rate to 19250
Mar 16 14:47:05 a thermald[617]: message repeated 4 times: [ [WARN]sysfs write failed /sys/devices/system/cpu/intel_pstate//no_turbo]
Mar 16 14:51:27 a dbus-daemon[611]: [system] Activating service name='org.kde.powerdevil.backlighthelper' requested by ':1.66' (uid=1000 pid=1089 comm="/usr/lib/x86_64-linux-gnu/libexec/org_kde_powerdev" label="unconfined") (using servicehelper)
Mar 16 14:51:28 a org.kde.powerdevil.backlighthelper: QDBusArgument: read from a write-only object
Mar 16 14:51:28 a kernel: [18681.550443] intel_powerclamp: Stop forced idle injection
Mar 16 14:51:28 a org.kde.powerdevil.backlighthelper: message repeated 2 times: [ QDBusArgument: read from a write-only object]
Mar 16 14:51:28 a dbus-daemon[611]: [system] Successfully activated service 'org.kde.powerdevil.backlighthelper'
Mar 16 14:51:28 a thermald[617]: [WARN]sysfs write failed /sys/devices/system/cpu/intel_pstate//no_turbo
Mar 16 14:51:28 a kernel: [18681.558076] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:51:39 a kernel: [18692.630741] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:51:45 a kernel: [18698.457756] mce: CPU2: Package temperature above threshold, cpu clock throttled (total events = 5677)
Mar 16 14:51:45 a kernel: [18698.457759] mce: CPU1: Package temperature above threshold, cpu clock throttled (total events = 5677)
Mar 16 14:51:45 a kernel: [18698.457762] mce: CPU3: Package temperature above threshold, cpu clock throttled (total events = 5677)
Mar 16 14:51:45 a kernel: [18698.457765] mce: CPU0: Package temperature above threshold, cpu clock throttled (total events = 5677)
Mar 16 14:51:45 a kernel: [18698.458797] mce: CPU1: Package temperature/speed normal
Mar 16 14:51:45 a kernel: [18698.458801] mce: CPU2: Package temperature/speed normal
Mar 16 14:51:45 a kernel: [18698.458804] mce: CPU0: Package temperature/speed normal
Mar 16 14:51:45 a kernel: [18698.458808] mce: CPU3: Package temperature/speed normal
Mar 16 14:51:49 a kernel: [18702.688444] intel_powerclamp: Start idle injection to reduce power
Mar 16 14:52:34 a kernel: [18748.030287] intel_powerclamp: Stop forced idle injection
Mar 16 14:52:34 a kernel: [18748.031053] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:52:34 a kernel: [18748.185669] perf: interrupt took too long (13118 > 12911), lowering kernel.perf_event_max_sample_rate to 15000
Mar 16 14:52:56 a kernel: [18770.058709] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:53:06 a kernel: [18780.073443] intel_powerclamp: Start idle injection to reduce power
Mar 16 14:53:18 a kernel: [18792.092764] intel_powerclamp: Stop forced idle injection
Mar 16 14:53:18 a kernel: [18792.093307] intel_pstate: Turbo disabled by BIOS or unavailable on processor
Mar 16 14:53:18 a thermald[617]: message repeated 4 times: [ [WARN]sysfs write failed /sys/devices/system/cpu/intel_pstate//no_turbo]
答え1
友人のコンピューターがこのような症状を起こし始めました。彼はそれをラップトップとして使っておらず、テレビに接続したまま動かしていません。目に見えて埃が積もっており、CPU の温度を 90 ～ 95 度の範囲に保つために kinject しています。彼は以前埃を吹き飛ばし、その後は kinject しない程度に冷えた状態を保っているので、彼の場合はそれが解決策だと確信しています。
古いスレッドを掘り返していることは承知していますが、このような状況になっている場合は、冷却システムにほこりが入っている可能性が高くなります。または、システムが設計上冷却不足になっている可能性があります (一部のベンダーは、ファンが本当に必要な CPU でファンレス セットアップを好むか、または、熱くなってファンの回転速度が遅くなり、速度が少し上がるのをあきらめる必要があるときにファンを低速に維持しているようです)。