My setup is as follows:
* Lenovo Thinkpad T15 with Debian 12 + Cinnamon installed
* T15 is connected via Thunderbolt cable to Lenovo ThinkPad Thunderbolt 3 Dock station
* two monitors are connected to ThinkPad Thunderbolt 3 Dock via DP cables
I'm using only two external monitors, T15 lid is closed.
When I power on the laptop via dock station, Grub menu appears on both external monitors, after that when I select Debian, monitors start to blink and after some time they are disabled.
In order to get Debian working I need to
* open laptop lid
* disconnect Thunderbolt cable from the laptop
* wait for Debian to appear on laptop screen
* connect back Thunderbolt cable from the Dock to laptop
* after above operations, both external monitors are working correctly and I can close laptop lid
In 'Display settings', I have laptop screen disabled and one of external monitors is set as Primary.
In 'Power Management' settings I have:
* When the ld s closed: Do nothing (for both On A/C power and On battery power)
* Perform lid-closed action even with external monitors attached - ENABLED
Earlier I was using Linux Mint 21.1 with Cinnamon with above settings and I did not have such issues, everything was working flawlessly.
It looks that latest firmware is installed:
Code: Select all
root@T15:~# fwupdmgr get-updates
Devices with no available firmware updates:
• UEFI Device Firmware
• UEFI Device Firmware
• UEFI Device Firmware
• UEFI Device Firmware
• UEFI Device Firmware
• Integrated Camera
• ThinkPad Thunderbolt 3 Dock
• UEFI dbx
Devices with the latest available firmware version:
• Embedded Controller
• Intel Management Engine
• Intel Management Engine
• System Firmware
• MZVLB512HBJQ-000L7
• Prometheus
• Prometheus IOTA Config
No updates available
root@T15:~#
I would appreciate hints on what logs to check and how to fix the issue.
Thanks in advance.
Przemek