我正在阅读我的启动日志，试图/var/log了解为什么启动过程需要这么长时间。
我发现系统无法访问许多 USB 设备，但不明白原因。
有没有办法阻止 Ubuntu 尝试访问它们？
具体如下：
/var/log# grep -r "usb_id" .
./boot.log:usb_id[716]: 无法
访问
‘/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input7/mouse1’
./boot.log:usb_id[721]: 无法
访问
‘/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input7/event7’
./boot.log:usb_id[725]: 无法
访问
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input7/event7'
./syslog:Jan 12 21:12:05 TomsterInc
usb_id[955]: 无法访问
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input16/event16'
./syslog:Jan 12 21:12:05 TomsterInc
usb_id[956]: 无法访问
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input16/mouse3'
./syslog:Jan 12 21:12:05 TomsterInc
usb_id[963]: 无法访问
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input16/event16'
./daemon.log:Jan 12 21:12:05
TomsterInc usb_id[955]: 无法
访问
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input16/event16'
./daemon.log:Jan 12 21:12:05
TomsterInc usb_id[956]: 无法
访问
'/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/input/input16/mouse3'
./daemon.log:Jan 12 21:12:05
TomsterInc usb_id[963]: 无法
访问
'/设备/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/输入/输入16/事件16'
更新
不确定是否有帮助，但这是我的 PCI 设备列表
PCI Devices
-----------
-PCI Devices-
Host bridge : Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
PCI bridge : Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) (prog-if 20)
Audio device : Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03)
PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
USB Controller : Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) (prog-if 20)
PCI bridge : Intel Corporation 82801 Mobile PCI Bridge (rev 93) (prog-if 01)
ISA bridge : Intel Corporation ICH9M LPC Interface Controller (rev 03)
SATA controller : Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03) (prog-if 01)
SMBus : Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
VGA compatible controller : ATI Technologies Inc Mobility Radeon HD 3400 Series
Audio device : ATI Technologies Inc RV620 Audio device [Radeon HD 34xx Series]
Network controller : Broadcom Corporation BCM4312 802.11b/g (rev 01)
Ethernet controller : Broadcom Corporation NetLink BCM5784M Gigabit Ethernet PCIe (rev 10)
FireWire (IEEE 1394) : Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05) (prog-if 10)
SD Host controller : Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22) (prog-if 01)
System peripheral : Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
System peripheral : Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
System peripheral : Ricoh Co Ltd xD-Picture Card Controller (rev ff) (prog-if ff)
任何帮助将不胜感激。
提前致谢。
答案1
看起来您的 USB 子系统很可能已损坏。虽然您确实插入了 USB 设备，但它可能是笔记本电脑，并且是内部插入的，而不是外部的 USB 连接器。
从外观上看，它看起来像某种触摸设备，可能是触摸板或触摸屏。但它还有很多其他按钮输入。当然，如果 USB 子系统坏了，所有这些都可能是假的。