我有 Dell Venue 變壓器，採用 LUbuntu 18.04，核心為 5.1.0-6.4-liquorix-amd64 #1 ZEN SMP PREEMPT Liquorix 5.1-4ubuntu1~bionic (2019-06-03) x86_64 x96_64 xNU xNU。我禁用了除 PBTN 之外的所有設備的喚醒功能。在 BIOS 中 USB PowerShare 已關閉。
儘管如此，暫停後筆記型電腦仍然很熱。只有三種設備不會改變電源狀態：
$ cat /proc/acpi/wakeup
...
EHC1 S0 *disabled
EHC2 S0 *disabled
XHC S0 *disabled pci:0000:00:14.0
...
journalctl -xe > JOURNAL.TXT
...
Jun 15 10:29:14 <Sys_Name> systemd-sleep[11312]: Suspending system...
-- Subject: System sleep state suspend entered
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- The system has now entered the suspend sleep state.
Jun 15 10:29:14 <Sys_Name> kernel: PM: suspend entry (s2idle)
Jun 15 10:29:14 <Sys_Name> kernel: PM: Syncing filesystems ... done.
Jun 15 10:29:31 <Sys_Name> kernel: Freezing user space processes ... (elapsed 0.008 seconds) done.
Jun 15 10:29:31 <Sys_Name> kernel: OOM killer disabled.
Jun 15 10:29:31 <Sys_Name> kernel: Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Jun 15 10:29:31 <Sys_Name> kernel: printk: Suspending console(s) (use no_console_suspend to debug)
Jun 15 10:29:31 <Sys_Name> kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jun 15 10:29:31 <Sys_Name> kernel: sd 0:0:0:0: [sda] Stopping disk
Jun 15 10:29:31 <Sys_Name> kernel: Removing pn544
Jun 15 10:29:31 <Sys_Name> kernel: sd 0:0:0:0: [sda] Starting disk
Jun 15 10:29:31 <Sys_Name> kernel: mei_me 0000:00:16.0: NFC MEI VERSION: IVN 0x1 Vendor ID 0x1 Type 0x1
Jun 15 10:29:31 <Sys_Name> kernel: ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
Jun 15 10:29:31 <Sys_Name> kernel: ata1.00: ACPI cmd ef/**:**:**:**:**:** (SET FEATURES) succeeded
Jun 15 10:29:31 <Sys_Name> kernel: ata1.00: ACPI cmd ef/**:**:**:**:**:** (SET FEATURES) succeeded
Jun 15 10:29:31 <Sys_Name> kernel: ata1.00: configured for UDMA/133
Jun 15 10:29:31 <Sys_Name> kernel: usb 2-2: Disable of device-initiated U1 failed.
Jun 15 10:29:31 <Sys_Name> kernel: usb 2-2: Disable of device-initiated U2 failed.
Jun 15 10:29:31 <Sys_Name> kernel: usb 2-2: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
Jun 15 10:29:31 <Sys_Name> kernel: usb 2-2.4: Disable of device-initiated U1 failed.
Jun 15 10:29:31 <Sys_Name> kernel: usb 2-2.4: Disable of device-initiated U2 failed.
Jun 15 10:29:31 <Sys_Name> kernel: usb 2-2.4: reset SuperSpeed Gen 1 USB device number 3 using xhci_hcd
Jun 15 10:29:31 <Sys_Name> kernel: OOM killer enabled.
Jun 15 10:29:31 <Sys_Name> kernel: Restarting tasks ... done.
Jun 15 10:29:31 <Sys_Name> kernel: Probing NFC pn544
Jun 15 10:29:31 <Sys_Name> kernel: pci_bus 0000:01: Allocating resources
Jun 15 10:29:31 <Sys_Name> kernel: pci_bus 0000:02: Allocating resources
...
對非受控 USB LED 玩具進行的測試表明，它們在暫停期間保持開啟。安裝laptop-mode-tools沒有幫助（可能需要一些額外的設定）。
如何將設備設定為S3或S4狀態？
答案1
我最近遇到了類似的問題，由於 USB 突然暫停停止工作。我寫了這個腳本來修復它：
#!/bin/bash
# Original script was using /bin/sh but shellcheck reporting warnings.
# NAME: custom-xhci_hcd
# PATH: /lib/systemd/system-sleep
# CALL: Called from SystemD automatically
# DESC: Suspend broken for USB3.0 as of Oct 25/2018 various kernels all at once
# DATE: Oct 28 2018.
# NOTE: From comment #61 at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/522998
TMPLIST=/tmp/xhci-dev-list
# Original script was: case "${1}" in hibernate|suspend)
case $1/$2 in
pre/*)
echo "$0: Going to $2..."
echo -n '' > $TMPLIST
for i in `ls /sys/bus/pci/drivers/xhci_hcd/ | egrep '[0-9a-z]+\:[0-9a-z]+\:.*$'`; do
# Unbind xhci_hcd for first device XXXX:XX:XX.X:
echo -n "$i" | tee /sys/bus/pci/drivers/xhci_hcd/unbind
echo "$i" >> $TMPLIST
done
;;
post/*)
echo "$0: Waking up from $2..."
for i in `cat $TMPLIST`; do
# Bind xhci_hcd for first device XXXX:XX:XX.X:
echo -n "$i" | tee /sys/bus/pci/drivers/xhci_hcd/bind
done
rm $TMPLIST
;;
esac
將腳本放入/lib/systemd/system-sleep/custom-xhci_hcd並使用以下命令將其標記為可執行：
chmod a+x /lib/systemd/system-sleep/custom-xhci_hcd
下次重新啟動時，腳本將被啟動。
暫停訊息日誌
使用journalctl -xe並按Page Up多次可查看掛起訊息：
Jun 14 17:30:51 alien systemd-sleep[16326]: /lib/systemd/system-sleep/custom-xhci_hcd: Going
Jun 14 17:30:51 alien kernel: xhci_hcd 0000:00:14.0: remove, state 4
Jun 14 17:30:51 alien kernel: usb usb2: USB disconnect, device number 1
Jun 14 17:30:51 alien kernel: usb 2-1: USB disconnect, device number 2
Jun 14 17:30:51 alien kernel: usb 2-1.4: USB disconnect, device number 3
Jun 14 17:30:51 alien kernel: xhci_hcd 0000:00:14.0: USB bus 2 deregistered
Jun 14 17:30:51 alien kernel: xhci_hcd 0000:00:14.0: remove, state 1
Jun 14 17:30:51 alien kernel: usb usb1: USB disconnect, device number 1
Jun 14 17:30:51 alien kernel: usb 1-1: USB disconnect, device number 2
Jun 14 17:30:51 alien kernel: usb 1-1.1: USB disconnect, device number 4
Jun 14 17:30:51 alien kernel: usblp1: removed
Jun 14 17:30:51 alien kernel: usb 1-1.2: USB disconnect, device number 6
然後按Page Down多次即可查看恢復訊息：
Jun 14 17:31:07 alien systemd-sleep[16326]: /lib/systemd/system-sleep/custom-xhci_hcd: Wakin
Jun 14 17:31:07 alien systemd-sleep[16326]: Selected interface 'p2p-dev-wlp60s0'
Jun 14 17:31:07 alien systemd-sleep[16326]: OK
Jun 14 17:31:07 alien systemd-sleep[16326]: /lib/systemd/system-sleep/lag-suspend.sh: Waking
Jun 14 17:31:07 alien kernel: PM: suspend exit
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: xHCI Host Controller
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus nu
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x100
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: cache line size of 128 is not supported
Jun 14 17:31:07 alien kernel: usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
Jun 14 17:31:07 alien kernel: usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumb
Jun 14 17:31:07 alien kernel: usb usb1: Product: xHCI Host Controller
Jun 14 17:31:07 alien kernel: usb usb1: Manufacturer: Linux 4.14.114-0414114-generic xhci-hc
Jun 14 17:31:07 alien kernel: usb usb1: SerialNumber: 0000:00:14.0
Jun 14 17:31:07 alien kernel: hub 1-0:1.0: USB hub found
Jun 14 17:31:07 alien kernel: hub 1-0:1.0: 16 ports detected
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: xHCI Host Controller
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus nu
Jun 14 17:31:07 alien kernel: xhci_hcd 0000:00:14.0: Host supports USB 3.0 SuperSpeed
Jun 14 17:31:07 alien kernel: usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
Jun 14 17:31:07 alien kernel: usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumb
Jun 14 17:31:07 alien kernel: usb usb2: Product: xHCI Host Controller
Jun 14 17:31:07 alien kernel: usb usb2: Manufacturer: Linux 4.14.114-0414114-generic xhci-hc
Jun 14 17:31:07 alien kernel: usb usb2: SerialNumber: 0000:00:14.0
Jun 14 17:31:07 alien kernel: hub 2-0:1.0: USB hub found
Jun 14 17:31:07 alien kernel: hub 2-0:1.0: 8 ports detected
Jun 14 17:31:07 alien eyesome[16633]: Wakeup: Called from suspend.