启动使用电池运行的笔记本电脑几分钟后，通常是在启动 Firefox 时，计算机经常会冻结几分钟，而系统指示器会显示硬盘活动已满。几分钟后，计算机恢复正常功能。有时它会再次冻结。
dmesg 表示与硬盘的通信存在问题，
[ 1569.063724] ata1.00: failed command: READ FPDMA QUEUED
[ 1569.063728] ata1.00: cmd 60/18:f0:70:ef:1f/00:00:0c:00:00/40 tag 30 ncq 12288 in
res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1569.063730] ata1.00: status: { DRDY }
上述消息出现了 30 次
[ 1569.063734] ata1: hard resetting link
[ 1569.383531] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1569.386325] ata1.00: LPM support broken, forcing max_power
[ 1569.386424] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
[ 1569.386427] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[ 1569.386447] ata1.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded
[ 1569.386538] ata1.00: supports DRM functions and may not be fully accessible
[ 1569.386782] ata1.00: LPM support broken, forcing max_power
[ 1569.386853] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
[ 1569.386855] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
[ 1569.386875] ata1.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded
[ 1569.386964] ata1.00: supports DRM functions and may not be fully accessible
[ 1569.387113] ata1.00: configured for UDMA/133
[ 1569.399531] ata1.00: device reported invalid CHS sector 0
[ 1569.399533] ata1.00: device reported invalid CHS sector 0
[ 1569.399535] ata1.00: device reported invalid CHS sector 0
[ 1569.399538] ata1.00: device reported invalid CHS sector 0
[ 1569.399540] ata1.00: device reported invalid CHS sector 0
[ 1569.399543] ata1.00: device reported invalid CHS sector 0
[ 1569.399548] ata1.00: device reported invalid CHS sector 0
[ 1569.399550] ata1.00: device reported invalid CHS sector 0
[ 1569.399552] ata1.00: device reported invalid CHS sector 0
[ 1569.399553] ata1.00: device reported invalid CHS sector 0
[ 1569.399570] ata1: EH complete
该系统是运行 Ubuntu 16.04 的联想 X250
这个问题在 Windows 上不会发生，在 Ubuntu 上也不会发生，但在有线电源上不会发生。因此，我怀疑这与我的硬盘不支持电源管理 (PM) 有关 -https://bugzilla.kernel.org/show_bug.cgi?id=57211
该硬盘经过全面测试，在问题发生的过去一年中没有出现任何故障，