During i915 testing on a Coffee lake system, there was connectivity problems related to the following dmesg logs: <3>[ 248.884891] ax88179_178a 2-6:1.0 enx000acd2892d1: Error submitting the control message: status=-19 <3>[ 248.884960] ax88179_178a 2-6:1.0 enx000acd2892d1: Error submitting the control message: status=-19 <4>[ 248.885122] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x0000: -19 <4>[ 248.885150] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x0001: -19 <4>[ 248.885176] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x0009: -19 <4>[ 248.885205] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x000a: -19 <4>[ 248.885229] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x0004: -19 <4>[ 248.885253] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x0005: -19 <3>[ 248.885320] ax88179_178a 2-6:1.0 enx000acd2892d1: Error submitting the control message: status=-19 <3>[ 248.885385] ax88179_178a 2-6:1.0 enx000acd2892d1: Error submitting the control message: status=-19 <6>[ 248.885772] ax88179_178a 2-6:1.0 enx000acd2892d1: unregister 'ax88179_178a' usb-0000:00:14.0-6, ASIX AX88179 USB 3.0 Gigabit Ethernet <4>[ 248.885907] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to read reg index 0x0002: -19 <4>[ 248.885932] ax88179_178a 2-6:1.0 enx000acd2892d1: Failed to write reg index 0x0002: -19 <4>[ 248.903770] ax88179_178a 2-6:1.0 enx000acd2892d1 (unregistered): Failed to write reg index 0x0002: -19 <4>[ 248.903789] ax88179_178a 2-6:1.0 enx000acd2892d1 (unregistered): Failed to write reg index 0x0001: -19 <4>[ 248.903807] ax88179_178a 2-6:1.0 enx000acd2892d1 (unregistered): Failed to write reg index 0x0002: -19 More logs are available here: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3378/fi-cfl-s2/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c.html