According to the lspcon chip datasheet, there's an optional reset pin that can reset the chip. I wonder if it's not being used under Linux.
Anyway, please file an upstream bug at Intel graphics upstream: https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1886230 Title: Thinkpad P1 Gen2 HDMI doesn't work after log out or reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886230/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs