Ubuntu 20.04 on Lenovo T480s. This problem has appeared only in the last week. I've been running 20.04 since May and had never seen this problem before.
Boot hangs on Ubuntu spinning splash with HDMI directly connected for 2nd monitor. Booting without HDMI connected works fine.
- removing "splash quiet" in /etc/grub/default does NOT avoid problem.
- changing /etc/gdm3/custom.conf as in #31 above does NOT avoid the problem.
- switching from gdm3 to either sddm or lightdm avoids the problem.
Ubuntu 20.04 on Lenovo T480s. This problem has appeared only in the last week. I've been running 20.04 since May and had never seen this problem before.
Boot hangs on Ubuntu spinning splash with HDMI directly connected for 2nd monitor. Booting without HDMI connected works fine.
- removing "splash quiet" in /etc/grub/default does NOT avoid problem. custom. conf as in #31 above does NOT avoid the problem.
- changing /etc/gdm3/
- switching from gdm3 to either sddm or lightdm avoids the problem.