我今天用 Debian amd64 构建了一台电脑。每次登录时，我都会看到数百行（随着会话的进行而增加）错误：EP 环上没有空间。我在这个论坛上看到了另一个此类问题：
ep 环上没有空间？ 但当用户重新启动时，该错误似乎已解决。但是，只有当我从 BIOS 禁用 xhci 模式时，才会停止。需要注意的要点： 1. 从 BIOS 启用时，USB3 似乎可以工作（按照 hdparm），尽管速度不是理想的（证明在 2 中） 2. 系统日志显示设备反复从 USB 断开连接和连接港口。
Dec 12 22:58:08 bassypc kernel: [ 116.205710] usb 3-2: new SuperSpeed USB device number 2 using xhci_hcd
Dec 12 22:58:08 bassypc kernel: [ 116.222393] usb 3-2: New USB device found, idVendor=0bc2, idProduct=a013
Dec 12 22:58:08 bassypc kernel: [ 116.222402] usb 3-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
Dec 12 22:58:08 bassypc kernel: [ 116.222407] usb 3-2: Product: Backup+ BK
Dec 12 22:58:08 bassypc kernel: [ 116.222411] usb 3-2: Manufacturer: Seagate
Dec 12 22:58:08 bassypc kernel: [ 116.222415] usb 3-2: SerialNumber: NA533VHH
Dec 12 22:58:08 bassypc mtp-probe: checking bus 3, device 2: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2"
Dec 12 22:58:08 bassypc mtp-probe: bus: 3, device: 2 was not an MTP device
Dec 12 22:58:08 bassypc kernel: [ 116.291467] Initializing USB Mass Storage driver...
Dec 12 22:58:08 bassypc kernel: [ 116.291524] scsi5 : usb-storage 3-2:1.0
Dec 12 22:58:08 bassypc kernel: [ 116.291569] usbcore: registered new interface driver usb-storage
Dec 12 22:58:08 bassypc kernel: [ 116.291570] USB Mass Storage support registered.
Dec 12 22:58:08 bassypc kernel: [ 116.705536] usb 3-2: USB disconnect, device number 2
Dec 12 22:58:08 bassypc kernel: [ 116.945509] usb 3-2: new SuperSpeed USB device number 3 using xhci_hcd
Dec 12 22:58:08 bassypc kernel: [ 116.962192] usb 3-2: New USB device found, idVendor=0bc2, idProduct=a013
Dec 12 22:58:08 bassypc kernel: [ 116.962201] usb 3-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
Dec 12 22:58:08 bassypc kernel: [ 116.962206] usb 3-2: Product: Backup+ BK
Dec 12 22:58:08 bassypc kernel: [ 116.962210] usb 3-2: Manufacturer: Seagate
Dec 12 22:58:08 bassypc kernel: [ 116.962214] usb 3-2: SerialNumber: NA533VHH
Dec 12 22:58:08 bassypc kernel: [ 116.963037] scsi6 : usb-storage 3-2:1.0
Dec 12 22:58:08 bassypc mtp-probe: checking bus 3, device 3: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2"
Dec 12 22:58:08 bassypc mtp-probe: bus: 3, device: 3 was not an MTP device
. /*ERROR: No room on ep ring keeps filling up more lines here*/
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Dec 12 22:58:09 bassypc kernel: [ 117.961789] scsi 6:0:0:0: Direct-Access Seagate Backup+ BK 0410 PQ: 0 ANSI: 6
Dec 12 22:58:09 bassypc kernel: [ 117.965025] sd 6:0:0:0: Attached scsi generic sg1 type 0
Dec 12 22:58:12 bassypc kernel: [ 117.965887] sd 6:0:0:0: [sdb] Spinning up disk.....
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Dec 12 22:58:12 bassypc kernel: [ 120.976350] .ready
Dec 12 22:58:12 bassypc kernel: [ 120.976735] sd 6:0:0:0: [sdb] 1953525167 512-byte logical blocks: (1.00 TB/931 GiB)
Dec 12 22:58:13 bassypc kernel: [ 121.159686] sd 6:0:0:0: [sdb] Write Protect is off
Dec 12 22:58:13 bassypc kernel: [ 121.159695] sd 6:0:0:0: [sdb] Mode Sense: 4f 00 00 00
Dec 12 22:58:13 bassypc kernel: [ 121.160046] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Dec 12 22:58:13 bassypc kernel: [ 121.170227] sdb: sdb1
Dec 12 22:58:13 bassypc kernel: [ 121.172725] sd 6:0:0:0: [sdb] Attached SCSI disk
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Dec 12 22:58:24 bassypc kernel: [ 132.601304] usb 3-2: USB disconnect, device number 3
对于能够“正常”使用 USB3 端口有什么建议或建议吗？