页次： 1
我的外置USB光驱在arch和ubuntu下都不读盘，win下很正常。
能识别，总是显示没有媒体。
而挂在virtualbox下，里面的xp有时都可以读盘。
就是在linux下不读盘，你说奇怪不？
买好久了，之前都可以了，记不清是内核到哪个版本出的问题了。
另插一根电源线都没用，就是没有读盘反应，然后说没有盘。
插入光驱识别正常：
[33207.150182] usb 1-1: new high-speed USB device number 4 using ehci_hcd
[33208.544122] usbcore: registered new interface driver uas
[33208.549601] Initializing USB Mass Storage driver...
[33208.549772] scsi2 : usb-storage 1-1:1.0
[33208.549905] usbcore: registered new interface driver usb-storage
[33208.549907] USB Mass Storage support registered.
[33209.552573] scsi 2:0:0:0: CD-ROM HL-DT-ST DVDRAM GSA-T50L SR07 PQ: 0 ANSI: 0
[33209.561574] sr1: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[33209.562585] sr 2:0:0:0: Attached scsi CD-ROM sr1自动挂载就别说了，手动挂载都不成功：
$ sudo mount /dev/sr1 /mnt
[sudo] password for lcc:
mount: no medium found on /dev/sr1提示没有光盘，可是光盘插上了，在win下验证过可读。
udev信息：
$ sudo udevadm info -a -n /dev/sr1
Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.
looking at device '/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host2/target2:0:0/2:0:0:0/block/sr1':
KERNEL=="sr1"
SUBSYSTEM=="block"
DRIVER==""
ATTR{ro}=="0"
ATTR{size}=="2097151"
ATTR{stat}==" 0 0 0 0 0 0 0 0 0 0 0"
ATTR{range}=="1"
ATTR{discard_alignment}=="0"
ATTR{events}=="media_change eject_request"
ATTR{ext_range}=="1"
ATTR{events_poll_msecs}=="-1"
ATTR{alignment_offset}=="0"
ATTR{inflight}==" 0 0"
ATTR{removable}=="1"
ATTR{capability}=="119"
ATTR{events_async}==""
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host2/target2:0:0/2:0:0:0':
KERNELS=="2:0:0:0"
SUBSYSTEMS=="scsi"
DRIVERS=="sr"
ATTRS{rev}=="SR07"
ATTRS{type}=="5"
ATTRS{scsi_level}=="0"
ATTRS{model}=="DVDRAM GSA-T50L "
ATTRS{state}=="running"
ATTRS{queue_type}=="none"
ATTRS{iodone_cnt}=="0xda"
ATTRS{iorequest_cnt}=="0xda"
ATTRS{timeout}=="30"
ATTRS{evt_media_change}=="0"
ATTRS{max_sectors}=="240"
ATTRS{ioerr_cnt}=="0xf"
ATTRS{queue_depth}=="1"
ATTRS{vendor}=="HL-DT-ST"
ATTRS{device_blocked}=="0"
ATTRS{iocounterbits}=="32"
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host2/target2:0:0':
KERNELS=="target2:0:0"
SUBSYSTEMS=="scsi"
DRIVERS==""
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host2':
KERNELS=="host2"
SUBSYSTEMS=="scsi"
DRIVERS==""
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0':
KERNELS=="1-1:1.0"
SUBSYSTEMS=="usb"
DRIVERS=="usb-storage"
ATTRS{bInterfaceClass}=="08"
ATTRS{bInterfaceSubClass}=="06"
ATTRS{bInterfaceProtocol}=="50"
ATTRS{bNumEndpoints}=="02"
ATTRS{supports_autosuspend}=="1"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bInterfaceNumber}=="00"
ATTRS{interface}=="Bulk Only Interface"
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-1':
KERNELS=="1-1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{devpath}=="1"
ATTRS{idVendor}=="1bcf"
ATTRS{speed}=="480"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{busnum}=="1"
ATTRS{devnum}=="4"
ATTRS{configuration}=="Bulk Only Configuration"
ATTRS{bMaxPower}==" 2mA"
ATTRS{authorized}=="1"
ATTRS{bmAttributes}=="c0"
ATTRS{bNumConfigurations}=="1"
ATTRS{maxchild}=="0"
ATTRS{bcdDevice}=="010f"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{quirks}=="0x0"
ATTRS{serial}=="FF0DF0FF0DF0F94F15058"
ATTRS{version}==" 2.00"
ATTRS{urbnum}=="693"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Sunplus Innovation Technology."
ATTRS{removable}=="unknown"
ATTRS{idProduct}=="0c31"
ATTRS{bDeviceClass}=="00"
ATTRS{product}=="USB to Serial-ATA bridge"
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1':
KERNELS=="usb1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{devpath}=="0"
ATTRS{idVendor}=="1d6b"
ATTRS{speed}=="480"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{authorized_default}=="1"
ATTRS{busnum}=="1"
ATTRS{devnum}=="1"
ATTRS{configuration}==""
ATTRS{bMaxPower}==" 0mA"
ATTRS{authorized}=="1"
ATTRS{bmAttributes}=="e0"
ATTRS{bNumConfigurations}=="1"
ATTRS{maxchild}=="8"
ATTRS{bcdDevice}=="0306"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{quirks}=="0x0"
ATTRS{serial}=="0000:00:1d.7"
ATTRS{version}==" 2.00"
ATTRS{urbnum}=="101"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Linux 3.6.8-1-ARCH ehci_hcd"
ATTRS{removable}=="unknown"
ATTRS{idProduct}=="0002"
ATTRS{bDeviceClass}=="09"
ATTRS{product}=="EHCI Host Controller"
looking at parent device '/devices/pci0000:00/0000:00:1d.7':
KERNELS=="0000:00:1d.7"
SUBSYSTEMS=="pci"
DRIVERS=="ehci_hcd"
ATTRS{irq}=="20"
ATTRS{subsystem_vendor}=="0x1028"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x0c0320"
ATTRS{companion}==""
ATTRS{consistent_dma_mask_bits}=="32"
ATTRS{dma_mask_bits}=="32"
ATTRS{local_cpus}=="ff"
ATTRS{device}=="0x27cc"
ATTRS{uframe_periodic_max}=="100"
ATTRS{enable}=="1"
ATTRS{msi_bus}==""
ATTRS{local_cpulist}=="0-7"
ATTRS{vendor}=="0x8086"
ATTRS{subsystem_device}=="0x01d7"
ATTRS{d3cold_allowed}=="1"
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""求帮助！！！！！
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页次： 1