NVIDIA Proprietary Driver supports KMS now - can the DisplayLink driver support it?

[jepster]

I have set the

nvidia-drm modeset=1

option in the

/etc/default/grub

file. This is the content of the grub-file:

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modset=1 log_buf_len=1M nvidia-drm.modeset=1"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

The

sudo update-grub

command has been also executed.

However, the external screens are not found via the Dell USB Dock 3.0 D3100 after a restart of the system.

[mlukaszek]

What's the output of

xrandr --listproviders

What happens if you use

xrandr --setprovideroutputsource 1 0

?

Cheers,
Michal

[jepster]

peter@computer:~$ xrandr --listproviders
Providers: number : 3
Provider 0: id: 0x206 cap: 0x1, Source Output crtcs: 4 outputs: 2 associated providers: 1 name:NVIDIA-0
Provider 1: id: 0x46 cap: 0x2, Sink Output crtcs: 3 outputs: 4 associated providers: 1 name:modesetting
Provider 2: id: 0x46 cap: 0x2, Sink Output crtcs: 3 outputs: 4 associated providers: 1 name:modesetting
peter@computer:~$

peter@computer:~$ xrandr --setprovideroutputsource 1 0
peter@computer:~$

After I insert this command, there is no signal sent to the 2 screens. There is only the laptop screen recognized in the display settings.

[mlukaszek]

Looks like there's yet another provider number 2. I guess 0 and 1 are for NVIDIA optimus setup, probably 2 will be evdi. So, try with 2 and 0.

Cheers,
Michal

[jepster]

I have tried

xrandr --setprovideroutputsource 2 0

There is still none of the displays recognized.

[mlukaszek]

What's the output of `xrandr` after doing the above? Do you see a DVI-*-* connector, if yes, does it look connected or not? Does `xrandr --auto` trigger any change?

Cheers,
Michal

[jepster]

What's the output of `xrandr` after doing the above?

This is the output:

peter@computer:~$ xrandr --setprovideroutputsource 2 0
peter@computer:~$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected
eDP-1 connected primary 1920x1080+0+0 344mm x 194mm
1920x1080 60.02*+ 59.93 47.99
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1280x1024 60.02
1440x900 59.89
1280x960 60.00
1360x768 59.80 59.96
1152x864 60.00
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
960x600 60.00
960x540 59.99
800x600 60.00 60.32 56.25
840x525 60.01 59.88
800x512 60.17
700x525 59.98
640x512 60.02
720x450 59.89
640x480 60.00 59.94
680x384 59.80 59.96
576x432 60.06
512x384 60.00
400x300 60.32 56.34
320x240 60.05
HDMI-1 disconnected
HDMI-2 disconnected
peter@computer:~$

Do you see a DVI-*-* connector, if yes, does it look connected or not?

"xrandr" does not report any "DVI-" text.

Does `xrandr --auto` trigger any change?

Unfortunately not.

Any further ideas? It would be a real improvement, if the "official" driver from Nvidia would be supported.