Arch Linux

jazzfan1980

Member

Registered: 2020-05-16

Posts: 3

[SOLVED] Lenovo T460p w/ dock: display TTY login on external monitor

Hello,

I am running Arch on a Lenovo T460p, in a LVM on LUCKS configuration, with a Lenovo Ultra dock.

What I am trying to achieve :
- login to computer when booting it in docked configuration

What I have managed to do :
Using autorandr, the computer switches automatically to one of these two configurations if boot up undocked:
- portable (uses only the laptop display)
- docked (uses two external displays attached to a Lenovo Ultra dock).

The problem :
When starting in dock configuration, the external monitors display the Lenovo logo and the prompt for the LUKS passphrase.

However, once the LUKS passphrase is correctly input, the display stucks on a blinking cursor and does not display the TTY login prompt.

Some additionnal info:

[me@arch ~]$ autorandr 
portable 
docked (current)

[me @ arch ~]$ cat /etc/mkinitcpio.conf | grep "block lvm2 encrypt" 
HOOKS=(base udev keyboard keymap autodetect modconf block lvm2 encrypt filesystems fsck) 

[me@arch ~]$ cat .config/autorandr/docked/config
output eDP1 # internal display
off
# [...] other outputs are off
output DP3-2 
crtc 1 
mode 3840x2160 
pos 0x0 
rate 60.00 
output DP3-1 
crtc 2 
mode 1920x1080 
pos 3840x0 
rate 60.00 
rotate right 

[me@arch ~]$ cat .config/autorandr/portable/config 
output DP1 
off 
# […] other outputs are off
output eDP1 
crtc 0 
mode 2560x1440 
pos 0x0 
primary 
rate 60.00 

Any hint on how I can solve the problem ? Thanks a lot for your help !

Last edited by jazzfan1980 (2020-05-17 13:58:40)

jazzfan1980

Member

Registered: 2020-05-16

Posts: 3

Re: [SOLVED] Lenovo T460p w/ dock: display TTY login on external monitor

Hello,

replying to myself here to add some info:
- the system is dual boot with Windows , and uses system-d boot.
- I am only using the Intel GPU, having not installed the NVidia drivers at all and not having the use for a dedicated graphic card.

I can provide any other additionnal information if needed.

I find this to be quite an annoyance because that means basically every morning I need to undock the computer just to boot it, I have found other posts mentionning systemd-boot but I have trouble finding additionnal info on where to look.

Thanks a lot again for your help !

Last edited by jazzfan1980 (2020-05-17 13:23:15)

jazzfan1980

Member

Registered: 2020-05-16

Posts: 3

Re: [SOLVED] Lenovo T460p w/ dock: display TTY login on external monitor

Hello,

I could solve the problem by adding the Intel driver to the module line of the mkinitcpio.conf, enabling the early Kernel Mode Setting (KMS) explained here:
https://wiki.archlinux.org/index.php/Ke … _KMS_start

/etc/mkinitcpio.conf

MODULES=(intel_agp i915)

Last edited by jazzfan1980 (2020-05-17 13:59:19)