[问题]我的ubuntu 老是自己关机

[fairy]

最近我发现我的系统每当cpu温度达到 50C 时就会出错(系统日志中显示的），
而且，一旦错误出现多了以后就会自动关机。
系统日志上重复出现一下错误记录:
[4295775.973000] ACPI-0435: *** Error: Looking up [HSTS] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [SSTS] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [CTLR] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [CMDR] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [ADDR] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [DAT0] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [DAT1] in namespace, AE_ALREADY_EXISTS
[4295775.973000] ACPI-0435: *** Error: Looking up [DATW] in namespace, AE_ALREADY_EXISTS
[4295776.026000] ACPI-0351: *** Error: Looking up [HSTS] in namespace, AE_NOT_FOUND
[4295776.026000] ACPI-0517: *** Error: Method parse/execution failed [\SMBC] (Node cf967fe0), AE_NOT_FOUND
[4295776.026000] ACPI-0517: *** Error: Method parse/execution failed [\WBYT] (Node cf967fa0), AE_NOT_FOUND
[4295776.026000] ACPI-0517: *** Error: Method parse/execution failed [\RTMP] (Node cf967ec0), AE_NOT_FOUND
[4295776.026000] ACPI-0517: *** Error: Method parse/execution failed [\_TZ_.THRM._TMP] (Node cf967e80), AE_NOT_FOUND

中间还夹杂这样的怪消息：
Critical temperature reached (-51634 C), shutting down.

不知是怎么回事。
那位知道怎么解决么？