私は、Thinkpad T450s と USB 3.0 ドッキング ステーション (Lenovo) を所有しており、16.04 LTS を実行しています。ドッキング ステーションは、いくつかの USB 周辺機器、イーサネット、および DisplayLink モニターに接続されています。ステーションは定期的に切断され、その後 (非常に速く、約 1 秒) 再接続されます。これらのイベントは通常、1 日に複数回発生しますが、これまでに何日も問題なく経過したことがあります。私が知る限り、関連するドライバー (DisplayLink を含む) はすべて最新です。
私の dmesg も (無関係だと思う) スパムで溢れており、ドックが切断されているかどうかに関係なく、絶えず送信されます。
[373168.536341] [drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value 0x4000041, supported mask 0x7400003f
[373168.553436] [drm:drm_wait_vblank [drm]] *ERROR* Unsupported type value 0x41, supported mask 0x7400003f
dmesg スパムのため、現在、切断と再接続のログはありません。ログをキャプチャできたら含めますが、ドッキング ステーションに接続されているデバイスのリストが切断されてから再接続される以外に、異常なことは何も示されていないと思います。
ありがとう！
編集: 切断直後の dmesg の結果は次のとおりです。
[499047.292100] usb 3-3: USB disconnect, device number 53
[499047.292104] usb 3-3.1: USB disconnect, device number 55
[499047.294353] cdc_ncm 3-3.1:1.5 enxe04f4359a6b1: unregister 'cdc_ncm' usb-0000:00:14.0-3.1, CDC NCM
[499047.321377] usb 3-3.4: USB disconnect, device number 54
[499047.333135] evdi: [D] evdi_painter_disconnect:611 (dev=1) Disconnected from ffff8801c08dd400
[499047.333139] evdi: [D] evdi_detect:78 Painter is disconnected
[499047.333178] evdi: [W] evdi_painter_disconnect:593 (dev=-1) An unknown connection to ffff8801c08dd400 tries to close us
[499047.333180] evdi: [W] evdi_painter_disconnect:594 - ignoring
[499047.341965] evdi: [D] evdi_detect:78 Painter is disconnected
[499047.379218] evdi: [D] evdi_painter_crtc_state_notify:481 (dev=-1) Notifying crtc state: 3
[499047.379221] evdi: [W] evdi_painter_send_crtc_state:387 Painter is not connected!
[499047.602454] usb 3-3: new SuperSpeed USB device number 56 using xhci_hcd
[499047.717203] usb 3-3: New USB device found, idVendor=17ef, idProduct=1014
[499047.717209] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[499047.717212] usb 3-3: Product: TP USB 3.0 Ultra Dock
[499047.717214] usb 3-3: Manufacturer: LENOVO
[499047.733011] hub 3-3:1.0: USB hub found
[499047.735168] hub 3-3:1.0: 4 ports detected
[499048.148156] usb 3-3.1: new SuperSpeed USB device number 57 using xhci_hcd
[499048.165704] usb 3-3.1: New USB device found, idVendor=17e9, idProduct=4340
[499048.165712] usb 3-3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[499048.165716] usb 3-3.1: Product: ThinkPad USB 3.0 Ultra Dock
[499048.165718] usb 3-3.1: Manufacturer: DisplayLink
[499048.165720] usb 3-3.1: SerialNumber: 4551152301011274J1YY
[499048.221380] usb 3-3.1: Warning! Unlikely big volume range (=511), cval->res is probably wrong.
[499048.221383] usb 3-3.1: [15] FU [Lenovo Audio Playback Volume] ch = 6, val = -8176/0/16
[499048.222201] usb 3-3.1: Warning! Unlikely big volume range (=767), cval->res is probably wrong.
[499048.222206] usb 3-3.1: [12] FU [Mic Capture Volume] ch = 2, val = -4592/7680/16
[499048.252543] cdc_ncm 3-3.1:1.5: MAC-Address: e0:4f:43:59:a6:b1
[499048.252548] cdc_ncm 3-3.1:1.5: setting rx_max = 16384
[499048.252663] cdc_ncm 3-3.1:1.5: setting tx_max = 16384
[499048.252913] cdc_ncm 3-3.1:1.5 usb0: register 'cdc_ncm' at usb-0000:00:14.0-3.1, CDC NCM, e0:4f:43:59:a6:b1
[499048.385196] usb 3-3.4: new SuperSpeed USB device number 58 using xhci_hcd
[499048.487299] usb 3-3.4: New USB device found, idVendor=17ef, idProduct=1015
[499048.487303] usb 3-3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[499048.487305] usb 3-3.4: Product: TP USB 3.0 Ultra Dock
[499048.487306] usb 3-3.4: Manufacturer: LENOVO
[499048.492208] hub 3-3.4:1.0: USB hub found
[499048.492376] hub 3-3.4:1.0: 4 ports detected
[499049.272800] cdc_ncm 3-3.1:1.5 enxe04f4359a6b1: renamed from usb0
[499049.310745] IPv6: ADDRCONF(NETDEV_UP): enxe04f4359a6b1: link is not ready
[499049.310819] IPv6: ADDRCONF(NETDEV_UP): enxe04f4359a6b1: link is not ready
[499050.607303] cdc_ncm 3-3.1:1.5 enxe04f4359a6b1: 1000 mbit/s downlink 1000 mbit/s uplink
[499050.623303] cdc_ncm 3-3.1:1.5 enxe04f4359a6b1: network connection: connected
[499050.623335] IPv6: ADDRCONF(NETDEV_CHANGE): enxe04f4359a6b1: link becomes ready
[499050.751126] evdi: [W] evdi_painter_disconnect:593 (dev=-1) An unknown connection to ffff8801efe9fe00 tries to close us
[499050.751128] evdi: [W] evdi_painter_disconnect:594 - ignoring
[499050.756546] evdi: [D] evdi_painter_connect:572 (dev=1) Connected with ffff8801efe9fe00
[499050.756549] evdi: [D] evdi_detect:75 (dev=1) Painter is connected
[499050.756608] evdi: [D] evdi_painter_crtc_state_notify:481 (dev=1) Notifying crtc state: 3
[499050.759243] evdi: [D] evdi_detect:75 (dev=1) Painter is connected
[499050.759248] evdi: [D] evdi_painter_get_edid_copy:215 (dev=1) 00 ff ff
[499050.793728] evdi: [D] evdi_painter_mode_changed_notify:505 (dev=1) Notifying mode changed: 1920x1080@60; bpp 32;
[499050.793730] evdi: [D] evdi_painter_mode_changed_notify:506 pixel format 875713112
[499050.793735] evdi: [D] evdi_painter_crtc_state_notify:481 (dev=1) Notifying crtc state: 0
[499050.793737] evdi: [D] evdi_painter_dpms_notify:468 (dev=1) Notifying dpms mode: 0