You have been subscribed to a public bug:
Dell 5520 laptop -> Dell Thunderbolt dock -> HDMI -> external monitor.
Running 20.04, i915 driver.
Laptop lid closed, using external monitor only. When external monitor
turns off (after sleep-display-ac), keyboard/mouse activity should turn
it back on, but do not. Opening and closing the laptop lid does turn
the external monitor back on. Laptop is not suspended; I can ssh in
from another machine.
Happy to collect any additional information.
To reproduce:
- On Dell 5520 laptop connected to Dell Thunderbolt dock connected to external
monitor via HDMI
- Close laptop lid
- Use external monitor, external keyboard, external mouse
- Leave system idle for "sleep-display-ac" time
- System puts external monitor in power-save mode
- Move mouse, type on keyboard
- No response, external monitor remains in power-save mode
- Open laptop lid
- External monitor turns on
- Close laptop lid
- External monitor remains on, I'm able to work as usual
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
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20.04 i915 laptop external monitor doesn't resume from power-save, must open
lid to turn it on
https://bugs.launchpad.net/bugs/1881644
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