Public bug reported:
grub does not boot at various conditions. It works if the laptop is
undocked, no external monitor is connected and if no external Keyboard
is connected. In all other cases grub hangs initializing devices:
- Laptop undocked, but external monitor connected: grub hangs while
initializing graphics. It never gets out of looping over the external monitor
device. Both(!) screens stay blank. The internal screen has its backlight
turned on, but is not selected as drawing device. Grub never displayes anything
on any screen.
Taping on/off immediately turns computer off again.
- Laptop docked, no external monitor connected: grub hangs while initializing
additional io devices. It never gets to initializing graphics. The interal
screen stays blank, backlight is turned off.
Taping on/off immediately turns computer off again.
- Laptop docked, external monitor connected: grub hangs while initializing
additional io devices. It initializes external monitor and graphixs. External
monitors backlight is turned on, but grub hangs while initializing internal
graphics.
Taping on/off immediately turns computer off again.
- Laptop undocked, external Kexboard connected: grub hangs while initializing
external keyboard.
Taping on/off immediately turns computer off again. Grub menu is shown, but you
no keybress recognized.
- Laptop docked, external Keyboard connected: grub hangs while initializing
external keyboard.
Taping on/off does not turn computer immediately off again. You'll have to
press the key for at least three seconds. Keyboard does not function. No
keypress recognized. Grub shows grub menu, but hangs loading os.
Same cases for a non laptop computer equiped with laptop equipment and
mainboard. Grub never shows grub menu on this computer, hanging while
initializing graphics.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: grub-pc 2.02+dfsg1-5ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Nov 8 07:23:12 2018
InstallationDate: Installed on 2011-10-19 (2576 days ago)
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: grub2
UpgradeStatus: Upgraded to cosmic on 2018-11-03 (5 days ago)
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug cosmic
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https://bugs.launchpad.net/bugs/1802237
Title:
grub does not boot at various circumstances
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