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有人能针对我遇到的 S4 电池耗尽问题提供建议吗？

tag-icon • tag-icon power-management battery hibernate
有人能针对我遇到的 S4 电池耗尽问题提供建议吗？

我在运行 Ubuntu 20.04.01 的 Lenovo Thinkpad T440 上使用 S4 休眠模式时遇到了问题。我注意到，在让机器进入休眠状态后，电池会严重耗电。例如……昨晚我的“备用电池”还有 56% 的电量（内部电池为 100%）。大约 9-10 小时后，备用电池的电量只剩下 18%。使用 S4 时，电池使用量应该很少，因为 RAM 被转储到交换器，所有内部设备都应该断电。

我已将 BIOS 更新至最新版本。我看不到任何与睡眠/休眠相关的 BIOS 选项。

这是内核日志....只是不知道接下来该去哪里。

Dec 16 23:56:50 ThinkPad kernel: [67999.420291] ACPI: EC: interrupt blocked
Dec 16 23:56:50 ThinkPad kernel: [67999.422887] ACPI: Preparing to enter system sleep state S4
Dec 16 23:56:50 ThinkPad kernel: [67999.476197] ACPI: EC: event blocked
Dec 16 23:56:50 ThinkPad kernel: [67999.476198] ACPI: EC: EC stopped
Dec 16 23:56:50 ThinkPad kernel: [67999.769263] ACPI: EC: EC started
Dec 16 23:56:50 ThinkPad kernel: [67999.778163] ACPI: Waking up from system sleep state S4
Dec 16 23:56:50 ThinkPad kernel: [67999.784996] ACPI: EC: interrupt unblocked
Dec 16 23:56:50 ThinkPad kernel: [67999.930028] ACPI: EC: event unblocked
Dec 16 23:56:50 ThinkPad kernel: [68000.256367] ata3.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
Dec 16 23:56:50 ThinkPad kernel: [68000.256369] ata3.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.256371] ata3.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.256408] ata3.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded
Dec 16 23:56:50 ThinkPad kernel: [68000.257449] ata3.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
Dec 16 23:56:50 ThinkPad kernel: [68000.257450] ata3.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.257452] ata3.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.257509] ata3.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded
Dec 16 23:56:50 ThinkPad kernel: [68000.267670] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
Dec 16 23:56:50 ThinkPad kernel: [68000.267672] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.267673] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.287632] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
Dec 16 23:56:50 ThinkPad kernel: [68000.287634] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
Dec 16 23:56:50 ThinkPad kernel: [68000.287635] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
Dec 17 09:08:59 ThinkPad kernel: [68339.263743] ACPI: EC: interrupt blocked
Dec 17 09:08:59 ThinkPad kernel: [68339.266052] ACPI: Preparing to enter system sleep state S4
Dec 17 09:08:59 ThinkPad kernel: [68339.319058] ACPI: EC: event blocked
Dec 17 09:08:59 ThinkPad kernel: [68339.319059] ACPI: EC: EC stopped
Dec 17 09:08:59 ThinkPad kernel: [68339.611285] ACPI: EC: EC started
Dec 17 09:08:59 ThinkPad kernel: [68339.622139] ACPI: Waking up from system sleep state S4
Dec 17 09:08:59 ThinkPad kernel: [68339.628760] ACPI: EC: interrupt unblocked
Dec 17 09:08:59 ThinkPad kernel: [68339.776254] ACPI: EC: event unblocked

可能是内核错误???

答案1

看来从内核 5.4 更新到 5.9 解决了这个问题。在休眠的 16 小时内，电池电量下降了 1%，而之前的内核则下降了 20% 以上。日志还显示正在加载特定的 ThinkPad ACPI 模块。

Dec 18 16:04:45 ThinkPad kernel: [   14.783480] thinkpad_acpi: ThinkPad ACPI Extras v0.26
Dec 18 16:04:45 ThinkPad kernel: [   14.787791] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver

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