evdi_mode_valid rejects all modes on kernel 4.9.8
 

Hi,

when connecting my Lenovo U31-70 to my usb docking station the HDMI connected external display is not recognized and i can see these messages in dmesg:

[ 2986.076049] evdi: [D] evdi_painter_connect:443 (dev=1) Connected with ffff9ac4e7ab3e00
[ 2986.076051] evdi: [D] evdi_detect:75 (dev=1) Painter is connected
[ 2986.076101] evdi: [D] evdi_painter_crtc_state_notify:360 (dev=1) Notifying crtc state: 3
[ 2986.077181] evdi: [D] evdi_detect:75 (dev=1) Painter is connected
[ 2986.077186] evdi: [D] evdi_painter_get_edid_copy:192 (dev=1) 00 ff ff
[ 2986.077223] evdi: [W] evdi_mode_valid:61 Mode 1680x1050@60 rejected
[ 2986.077225] evdi: [W] evdi_mode_valid:61 Mode 1280x1024@60 rejected
[ 2986.077226] evdi: [W] evdi_mode_valid:61 Mode 1280x960@60 rejected
[ 2986.077227] evdi: [W] evdi_mode_valid:61 Mode 1152x864@75 rejected
[ 2986.077228] evdi: [W] evdi_mode_valid:61 Mode 800x600@60 rejected
[ 2986.077229] evdi: [W] evdi_mode_valid:61 Mode 800x600@56 rejected
[ 2986.077230] evdi: [W] evdi_mode_valid:61 Mode 640x480@75 rejected
[ 2986.077231] evdi: [W] evdi_mode_valid:61 Mode 640x480@73 rejected
[ 2986.077233] evdi: [W] evdi_mode_valid:61 Mode 640x480@67 rejected
[ 2986.077234] evdi: [W] evdi_mode_valid:61 Mode 640x480@60 rejected
[ 2986.077235] evdi: [W] evdi_mode_valid:61 Mode 720x400@70 rejected
[ 2986.077236] evdi: [W] evdi_mode_valid:61 Mode 1280x1024@75 rejected
[ 2986.077237] evdi: [W] evdi_mode_valid:61 Mode 1024x768@75 rejected
[ 2986.077238] evdi: [W] evdi_mode_valid:61 Mode 1024x768@70 rejected
[ 2986.077240] evdi: [W] evdi_mode_valid:61 Mode 1024x768@60 rejected
[ 2986.077241] evdi: [W] evdi_mode_valid:61 Mode 832x624@75 rejected
[ 2986.077242] evdi: [W] evdi_mode_valid:61 Mode 800x600@75 rejected
[ 2986.077243] evdi: [W] evdi_mode_valid:61 Mode 800x600@72 rejected
[ 2986.077244] evdi: [W] evdi_mode_valid:61 Mode 848x480@60 rejected

so i think the kernel driver is rejecting all available display modes, so the external display is disabled. Anyone else observing this? All other external devices (mouse, keyboard) are working well.

kind regards,

Christoph

I have same problem
Was also posted up on evdi github
https://github.com/DisplayLink/evdi/issues/74
FWIW - the workaround does NOT work for me :(

Is basically a problem with evdi being updated almost a month ago now, but no new Displaylink Manager being released
@mlukaszek mentioned the update is meant to come this month

as it stands I am sticking with kernel 4.8 until the new displaylink manager is released which hopefully fixes this issue.