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“盖子设备不符合 SW_LID”是什么意思？意思是？

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“盖子设备不符合 SW_LID”是什么意思？意思是？

这是什么意思以及如何纠正它？

# cat /var/log/messages | grep -a 'lid'
Mar 22 00:36:00 debian kernel: [ 1039.517767] ACPI: button: The lid device is not compliant to SW_LID.

系统：

# uname -a
Linux debian 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1 (2020-01-26) x86_64 GNU/Linux

答案1

该消息来自Linux 内核中模块drivers/acpi/button.c的一部分 。 例如，在after 行下您可以找到它：ACPI_BUTTON
linux-source-4.19/drivers/acpi/button.c171

194 /* Complain the buggy firmware */
195 pr_warn_once("The lid device is not compliant to SW_LID.\n");

正如你所看到的，这条消息是在以下时间打印的：有缺陷的固件被检测到。评论继续说道：

196 /*
197  * Send the unreliable complement switch event:
.    *
.    * On most platforms, the lid device is reliable. However
.    * there are exceptions:
.    * 1. Platforms returning initial lid state as "close" by
.    *    default after booting/resuming:
.    *     https://bugzilla.kernel.org/show_bug.cgi?id=89211
.    *     https://bugzilla.kernel.org/show_bug.cgi?id=106151
.    * 2. Platforms never reporting "open" events:
.    *     https://bugzilla.kernel.org/show_bug.cgi?id=106941
.    * On these buggy platforms, the usage model of the ACPI
.    * lid device actually is:
.    * 1. The initial returning value of _LID may not be
.    *    reliable.
.    * 2. The open event may not be reliable.
.    * 3. The close event is reliable.
.    *
.    * But SW_LID is typed as input switch event, the input
.    * layer checks if the event is redundant. Hence if the
.    * state is not switched, the userspace cannot see this
.    * platform triggered reliable event. By inserting a
.    * complement switch event, it then is guaranteed that the
.    * platform triggered reliable one can always be seen by
.    * the userspace.
222  */

如何修复它 - 这只是一条诊断消息，如果一切正常，您可以忽略它。如果某些功能不起作用，您应该访问上面发布的链接，并为您拥有的特定硬件搜索可能的解决方案，或者尝试升级计算机的固件，不幸的是，这在 Linux 上可能并不总是可行。

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