Bounty: 50
I have a Dell Inspiron 5379 running the latest firmware and Ubuntu 20.04. After the notebook sleeps, intermittently, the keyboard and the trackpad won’t work. The touchscreen does work so I can reboot using the on screen keyboard. After rebooting the keyboard and the touchpad do work.
After googling, I found this suggestion to edit /etc/default/grub with this GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.direct i8042.dumbkbd" from Ubuntu 17.04 keyboard not responding after suspend but it does not have any effects.
I’ve also found Dell Inspiron 15-7568 Touchpad Move Freeze on Xenial 16.04 but it doesn’t seems to be applicable as I don’t have synapse installed.
Update: after installing synaptics (and confirming it’s being used by the trackpad through xinput list-props), the issue now affects only the keyboard. The keyboard is still being managed through libinput.
I’m somewhat convinced this is related to the "tablet mode" being enabled in certain conditions (https://www.dell.com/support/article/en-uk/sln305434/how-to-enable-or-disable-tablet-mode-on-your-notebook-in-windows-10?lang=en). I’m guessing what I need to find out is how to disable it.
Possibly related: https://bbs.archlinux.org/viewtopic.php?id=237782
Update 2: Tried to run xinput list-props while the keyboard wasn’t working, no additional info:
vitor@vitor-Inspiron-5379:~$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ ELAN Touchscreen id=12 [slave pointer (2)]
⎜ ↳ DELL0804:00 06CB:7E7E Mouse id=13 [slave pointer (2)]
⎜ ↳ DELL0804:00 06CB:7E7E Touchpad id=14 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ Integrated_Webcam_HD: Integrate id=10 [slave keyboard (3)]
↳ Integrated_Webcam_HD: Integrate id=11 [slave keyboard (3)]
↳ Intel Virtual Button driver id=15 [slave keyboard (3)]
↳ Intel HID events id=16 [slave keyboard (3)]
↳ Dell WMI hotkeys id=17 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=18 [slave keyboard (3)]
# Device not working
vitor@vitor-Inspiron-5379:~$ xinput list-props 18
Device 'AT Translated Set 2 keyboard':
Device Enabled (171): 1
Coordinate Transformation Matrix (173): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Send Events Modes Available (293): 1, 0
libinput Send Events Mode Enabled (294): 0, 0
libinput Send Events Mode Enabled Default (295): 0, 0
Device Node (296): "/dev/input/event4"
Device Product ID (297): 1, 1
vitor@vitor-Inspiron-5379:~$
# Device working (after reboot)
vitor@vitor-Inspiron-5379:~$ xinput list-props 18
Device 'AT Translated Set 2 keyboard':
Device Enabled (171): 1
Coordinate Transformation Matrix (173): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Send Events Modes Available (293): 1, 0
libinput Send Events Mode Enabled (294): 0, 0
libinput Send Events Mode Enabled Default (295): 0, 0
Device Node (296): "/dev/input/event4"
Device Product ID (297): 1, 1
vitor@vitor-Inspiron-5379:~$
Update 3: Followed this, found the appropriate event (https://github.com/alesguzik/linux_detect_tablet_mode also useful). Even unbinding the driver doesn’t seem to solve it as well.
I’m wondering if I should just try to write a GNOME Extension to manage tablet mode.