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Old 12-18-2021, 07:24 PM   #5
jefcap
Junior Member
 
Join Date: Dec 2021
Posts: 2
Default DisplayLink is unstable in ubuntu 20.04 after kernel 5.11.0-38

Noticed the usb connection drop after ~1hr usage. I could collect the logs using DLSupportTool (https://synaptics.com/products/displ...x-support-tool).
Noticed the following errors in dmesg associated to usb connection:

[ 1473.657317] usb 2-1.1: Disable of device-initiated U1 failed.
[ 1473.668280] usb 2-1.1: Disable of device-initiated U2 failed.
[ 1473.668385] cdc_ncm 2-1.1:1.5 enx0c379621a317: unregister 'cdc_ncm' usb-0000:00:14.0-1.1, CDC NCM
[ 1473.723868] usb 2-1.1: Set SEL for device-initiated U1 failed.
[ 1473.730972] usb 2-1.1: Set SEL for device-initiated U2 failed.
[ 1474.065826] usb 2-1.1: reset SuperSpeed Gen 1 USB device number 7 using xhci_hcd
[ 1474.101742] usb 2-1.1: Warning! Unlikely big volume range (=767), cval->res is probably wrong.
[ 1474.101746] usb 2-1.1: [4] FU [Mic Capture Volume] ch = 2, val = -4592/7680/16
[ 1474.102340] usb 2-1.1: Warning! Unlikely big volume range (=672), cval->res is probably wrong.

Please verify the root cause of it. Full logs attached.
Attached Files
File Type: zip DLSupportTool_Output_2021-12-18T16:08:11.643608.zip (645.0 KB, 0 views)
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