恢复CentOS VM时未添加/dev/ttyACM0 0
恢复CentOS VM时未添加/dev/ttyACM0 0
提问于 2019-06-14 23:03:43
我运行的是CentOS v.7.5.1804，内核3.10.0-862.el7.x86_64。
主机有一个USB映射到客户VM上的/dev/ttyACM0。
在运行systemctl suspend并恢复VM时，/dev/ttyACM0将被删除，但是不会被添加回。我唯一可以把它拿回来的方法就是物理上重新塞上它。下面是udevadm monitor的清单。
有可能在没有物理回复的情况下被发现吗？
我认为解决目前的问题也将有助于解决这一个。
######## UDEV events when dongle gets unplugged #############
KERNEL[40020.994890] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/tty/ttyACM0 (tty)
KERNEL[40020.994919] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
KERNEL[40020.994929] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.1 (usb)
KERNEL[40020.995073] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
UDEV [40020.996954] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/tty/ttyACM0 (tty)
UDEV [40020.997707] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.1 (usb)
UDEV [40020.998251] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
UDEV [40020.998773] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
######## UDEV events when dongle gets plugged back #############
KERNEL[40023.384021] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
KERNEL[40023.417572] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
KERNEL[40023.419436] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/tty/ttyACM0 (tty)
KERNEL[40023.421406] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.1 (usb)
UDEV [40023.427400] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
UDEV [40023.428051] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
UDEV [40023.428235] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.1 (usb)
UDEV [40023.430357] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/tty/ttyACM0 (tty)
####### VM is suspended and resumed here, /dev/ttyACM0 is removed but not added back############
KERNEL[40032.878071] remove /devices/system/machinecheck/machinecheck1 (machinecheck)
KERNEL[40032.878130] remove /devices/system/machinecheck/machinecheck2 (machinecheck)
KERNEL[40032.878140] remove /devices/system/machinecheck/machinecheck3 (machinecheck)
KERNEL[40032.878146] add /devices/system/machinecheck/machinecheck1 (machinecheck)
KERNEL[40032.878153] add /devices/system/machinecheck/machinecheck2 (machinecheck)
KERNEL[40032.878158] add /devices/system/machinecheck/machinecheck3 (machinecheck)
KERNEL[40032.878176] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0/rfkill7 (rfkill)
KERNEL[40032.878183] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0 (bluetooth)
KERNEL[40032.882785] change /devices/pci0000:00/0000:00:0f.0/drm/card0 (drm)
UDEV [40032.896262] remove /devices/system/machinecheck/machinecheck1 (machinecheck)
KERNEL[40032.897736] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/tty/ttyACM0 (tty)
KERNEL[40032.897750] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
KERNEL[40032.897758] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.1 (usb)
KERNEL[40032.916152] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
UDEV [40032.916188] remove /devices/system/machinecheck/machinecheck2 (machinecheck)
UDEV [40032.916238] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0/rfkill7 (rfkill)
UDEV [40032.916252] remove /devices/system/machinecheck/machinecheck3 (machinecheck)
UDEV [40032.916264] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0 (bluetooth)
UDEV [40032.916273] add /devices/system/machinecheck/machinecheck3 (machinecheck)
UDEV [40032.916281] add /devices/system/machinecheck/machinecheck2 (machinecheck)
UDEV [40032.921414] change /devices/pci0000:00/0000:00:0f.0/drm/card0 (drm)
UDEV [40032.921940] add /devices/system/machinecheck/machinecheck1 (machinecheck)
UDEV [40032.931733] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0/tty/ttyACM0 (tty)
UDEV [40032.933373] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.0 (usb)
UDEV [40032.933398] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2/2-2.2:1.1 (usb)
UDEV [40032.935702] remove /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.2 (usb)
KERNEL[40032.940491] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0 (bluetooth)
UDEV [40032.940514] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0 (bluetooth)
KERNEL[40032.940526] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0/rfkill8 (rfkill)
UDEV [40032.951063] add /devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/bluetooth/hci0/rfkill8 (rfkill)
KERNEL[40034.139906] add /kernel/slab/nf_conntrack_ffff9099a9dae680 (slab)
UDEV [40034.140268] add /kernel/slab/nf_conntrack_ffff9099a9dae680 (slab)回答 1
Unix & Linux用户
发布于 2019-06-17 15:27:29
好的，我仍然没有找到解决dongle不出现问题的方法，但我在研究中取得了进展，并意识到我在错误的社区中发布了这个问题:通过在主机的VMWare融合USB选项中显式地重新启用它，可以使dongle重新出现，而不需要物理地将它插回。因此，是VMWare融合负责在简历中不出现dongle，而不是来宾CentOS VM。
页面原文内容由Unix & Linux提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://unix.stackexchange.com/questions/525033
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