I would like to use strace to show what is going on.
So I stopped the running DisplayLinkManager while X is still running and started it again using "strace -f ...".
Now I see an additional provider and could use xrandr to activate the monitor output.
So at least it is working, but need to have a further look at the order of the commands.
Log:
Code:
Sep 02 23:05:00 m3800 kernel: [D] add_store increasing device count to 2
Sep 02 23:05:00 m3800 kernel: [D] evdi_crtc_init drm_crtc_init: 0
Sep 02 23:05:00 m3800 kernel: [D] evdi_encoder_init drm_encoder_init: 0
Sep 02 23:05:00 m3800 kernel: [D] evdi_detect Painter is disconnected
Sep 02 23:05:00 m3800 kernel: evdi evdi.1: No connectors reported connected with modes
Sep 02 23:05:00 m3800 kernel: [drm] Cannot find any crtc or sizes - going 1024x768
Sep 02 23:05:00 m3800 kernel: evdi evdi.1: fb2: evdidrmfb frame buffer device
Sep 02 23:05:00 m3800 kernel: [drm] evdi: evdi_stats_init
Sep 02 23:05:00 m3800 kernel: [drm] Initialized evdi 1.0.68 19700101 on minor 2
Sep 02 23:05:00 m3800 kernel: [W] evdi_painter_disconnect (dev=0) An unknown connection to ffff88042a424400 tries to close us - ignoring
Sep 02 23:05:00 m3800 kernel: [W] evdi_painter_disconnect (dev=0) An unknown connection to ffff88006731ee00 tries to close us - ignoring
Sep 02 23:05:00 m3800 kernel: [D] evdi_detect Painter is disconnected
Sep 02 23:05:00 m3800 kernel: [D] evdi_detect Painter is disconnected
Sep 02 23:05:00 m3800 kernel: [D] evdi_painter_crtc_state_notify (dev=0) Notifying crtc state: 0
Sep 02 23:05:00 m3800 kernel: [D] evdi_painter_crtc_state_notify (dev=0) Notifying crtc state: 0
Sep 02 23:05:10 m3800 kernel: [W] evdi_painter_disconnect (dev=0) An unknown connection to ffff880460654200 tries to close us - ignoring
Sep 02 23:05:10 m3800 kernel: [D] evdi_painter_connect (dev=2) Connected with ffff880415c1ae00
Sep 02 23:05:10 m3800 kernel: [D] evdi_painter_connect (dev=2) Edid (3 bytes): 00 ff ff
Sep 02 23:05:10 m3800 kernel: [D] evdi_detect (dev=2) Painter is connected
Sep 02 23:05:10 m3800 kernel: [D] evdi_detect (dev=2) Painter is connected
Sep 02 23:05:10 m3800 kernel: [D] evdi_painter_get_edid (dev=2) 00 ff ff
Sep 02 23:05:50 m3800 kernel: [D] evdi_detect (dev=2) Painter is connected
Sep 02 23:05:50 m3800 kernel: [D] evdi_painter_get_edid (dev=2) 00 ff ff
Sep 02 23:06:08 m3800 kernel: [D] evdi_detect (dev=2) Painter is connected
Sep 02 23:06:08 m3800 kernel: [D] evdi_painter_get_edid (dev=2) 00 ff ff
Sep 02 23:06:08 m3800 kernel: [D] evdi_painter_mode_changed_notify (dev=2) Notifying mode changed: 1920x1200@60; bpp 32; pixel format 875713112
Sep 02 23:06:08 m3800 kernel: [D] evdi_painter_crtc_state_notify (dev=2) Notifying crtc state: 1
Sep 02 23:06:08 m3800 kernel: [D] evdi_detect (dev=2) Painter is connected
Sep 02 23:06:08 m3800 kernel: [D] evdi_painter_get_edid (dev=2) 00 ff ff