[k001]

Hi Michał,

Thanks for looking into it.

Are two screens operational with the older 1.3 driver but identical version of all other packages?

I will try it later today and report back. One problem is I'm using 4.10+ kernels so I'll need to patch the older evdi to be compilable with newer kernels (not a big deal).

Does the second screen start to work if you restart X when one screen is up and running?

I never made it working with a new driver.

What's the contents of /sys/devices/evdi/count?

kir@kd:~$ cat /sys/devices/evdi/count 
2

What's the output of ls -la /dev/dri?

kir@kd:~$ ls -la /dev/dri
total 0
drwxr-xr-x   3 root root       140 Oct 17 23:43 .
drwxr-xr-x  20 root root      4280 Oct 18 10:29 ..
drwxr-xr-x   2 root root       120 Oct 17 23:43 by-path
crw-rw----+  1 root video 226,   0 Oct 17 23:43 card0
crw-rw----+  1 root video 226,   1 Oct 18 10:29 card1
crw-rw----+  1 root video 226,   2 Oct 18 10:29 card2
crw-rw----+  1 root video 226, 128 Oct 17 23:43 renderD128

With one screen running, what happens if you run (as root):

echo 1 > /sys/devices/evdi/add

possibly after replugging the USB cable after running it, too?

No changes, except that card3 appears in /dev/dri, and some messages in dmesg:

[ 2943.659412] evdi: [D] add_store:239 Increasing device count to 3
[ 2943.659897] evdi: [D] evdi_crtc_init:351 drm_crtc_init: 0
[ 2943.660676] evdi: [W] evdi_painter_crtc_state_notify:484 Painter does not exist!
[ 2943.660686] evdi: [D] evdi_detect:78 Painter is disconnected