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[bug #65503] No video output on some systems

From: Daniel
Subject: [bug #65503] No video output on some systems
Date: Thu, 21 Mar 2024 18:20:11 -0400 (EDT)


                 Summary: No video output on some systems
                   Group: GNU GRUB
               Submitter: nrg
               Submitted: Thu 21 Mar 2024 10:20:10 PM UTC
                Category: User Interface
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: other
         Discussion Lock: Any
         Reproducibility: Every Time
         Planned Release: None


Follow-up Comments:

Date: Thu 21 Mar 2024 10:20:10 PM UTC By: Daniel <nrg>
= No video output on some systems =
== Description ==
GRUB is functional but does not output video. It can be navigated blindly and
does boot Linux/Windows.
The issue seems to be that _gfxterm_ crashes if _load_video_ hasn't had enough
time to set up the video mode.
== Systems ==
==== Affected ====
* Thinkpad X1 Carbon Gen 3 (Intel i5-5300U, Intel HD Graphics 5500) running
Arch Linux
* VMware Fusion virtual machine running on an old Mac Pro with Arch Linux
* Other users running Ubuntu have also reported this issue; see the source for
the workaround below
==== Unaffected ====
* My desktop PC (Intel i7-7700K, Nvidia GTX 1080) running Arch Linux
* A VMware Workstation VM (hosted on Windows on my desktop PC) running Arch
== Workaround ==
Editing _00_header_ to include _sleep .1_ or _sleep .5_ between the lines
_load_video_ and _insmod gfxterm_. This works on both of my affected machines.
However, the workaround has to be manually reapplied after each update, which
are relatively frequent on Arch.
Here an excerpt (with line numbers for easy reference) of _00_header_ with the
workaround in place:

196   set gfxmode=${GRUB_GFXMODE}
197   load_video
198   sleep .1
199   insmod gfxterm
200 EOF

The source for the workaround is this discussion on Ask Ubuntu:
Grub menu working but hidden, can't make it visible].
== Additional Information ==
* Disabling _gfxterm_ and using the text console instead also works, but is
less visually appealing.
* Trying to use other, different video resolutions does not work.
* The last GRUB package on Arch that worked for me without the workaround was
version 2.06-5.
* The last unaffected version on Ubuntu is unknown to me.
Here is the _/etc/defaults/grub_ from my Thinkpad (out-commented and empty
lines removed):

GRUB_CMDLINE_LINUX_DEFAULT="usbcore.autosuspend=5 retbleed=stuff"
GRUB_PRELOAD_MODULES="part_gpt part_msdos"
export GRUB_COLOR_NORMAL="light-red/black"
export GRUB_COLOR_HIGHLIGHT="light-magenta/light-blue"

I created this bug report here instead of the Arch Bugtracker because it seems
to be not necessarily specific to Arch. If that is not the case, or if there
is anything else I can do, please let me know.


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