GNU bug report logs - #39607
Make use of GRUB all_video module

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: bug-guix <bug-guix <at> gnu.org>
Subject: GRUB module all_video required to get video on 4K monitor
Date: Fri, 14 Feb 2020 14:30:14 -0500

Hello,

I installed Guix System on a new machine, which displays on a 4K (3840 x
2160 pixels) monitor.

Unless I go to the GRUB command prompt with 'c' at boot and type 'insmod
all_video', the video cuts early after booting a GRUB entry with 'No
suitable video mode found', or similar.

I think we should include this GRUB module in our default GRUB
package/configuration.

Maxim

Message #8 received at 39607 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: 39607 <at> debbugs.gnu.org
Subject: Re: bug#39607: GRUB module all_video required to get video on 4K
 monitor
Date: Wed, 19 Feb 2020 21:55:54 -0500

[Message part 1 (text/plain, inline)]

Hello,

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:

> Hello,
>
> I installed Guix System on a new machine, which displays on a 4K (3840 x
> 2160 pixels) monitor.
>
> Unless I go to the GRUB command prompt with 'c' at boot and type 'insmod
> all_video', the video cuts early after booting a GRUB entry with 'No
> suitable video mode found', or similar.
>
> I think we should include this GRUB module in our default GRUB
> package/configuration.
>
> Maxim

I think the attached patches fixes this issue, and makes the
GRUB configuration a bit simpler too!

[0001-bootloader-grub-Use-the-all_video-module-in-graphic-.patch (text/x-patch, attachment)]

[0002-bootloader-grub-Refactor-eye-candy-a-bit.patch (text/x-patch, attachment)]

Message #11 received at 39607 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: 39607 <at> debbugs.gnu.org
Subject: Re: bug#39607: GRUB module all_video required to get video on 4K
 monitor
Date: Fri, 21 Feb 2020 09:33:53 -0500

[Message part 1 (text/plain, inline)]

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:

> Hello,
>
> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>
>> Hello,
>>
>> I installed Guix System on a new machine, which displays on a 4K (3840 x
>> 2160 pixels) monitor.
>>
>> Unless I go to the GRUB command prompt with 'c' at boot and type 'insmod
>> all_video', the video cuts early after booting a GRUB entry with 'No
>> suitable video mode found', or similar.
>>
>> I think we should include this GRUB module in our default GRUB
>> package/configuration.
>>
>> Maxim
>
> I think the attached patches fixes this issue, and makes the
> GRUB configuration a bit simpler too!

While the patches above are an improvement over the current situation,
it still doesn't resolve my problem.  I still get the 'No suitable video
modes, booting in blind mode' message after activating a GRUB entry,
unless I manually "insmod all_video"...

Here's my grub.cfg, along with a blank one generated by 'grub-mkconfig'
for comparison.

[grub.cfg (text/plain, attachment)]

[grub.cfg.default (text/plain, attachment)]

Message #14 received at 39607 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: bug#39607 <39607 <at> debbugs.gnu.org>
Subject: Re: Status: GRUB module all_video required to get video on 4K monitor
Date: Mon, 24 Feb 2020 09:08:27 -0500

Update, after debugging: the failure to find a working video mode had
nothing to do with the 4K monitor, and everything to do with a problem
in our GRUB configuration generator and having /gnu/store on a Btrfs
submodule.

In particular, this generated pice of GRUB configuration:

--8<---------------cut here---------------start------------->8---
if loadfont /rootfs/gnu/store/m1fx9h7gzw78k0n4da0khbga5i6k8ipk-grub-2.04/share/grub/unicode.pf2; then
  setup_gfxterm
fi
--8<---------------cut here---------------end--------------->8---

was causing the setup_gfxterm to not be called due to failing to resolve
the unicode.pf2 file when using a Btrfs submodule.

The originally attached patches still provide some >
simplification/cleanup that would make it good to merge nontheless, I
believe!

Maxim

Message #21 received at 39607-done <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: 39607-done <at> debbugs.gnu.org
Subject: Re: bug#39607: GRUB module all_video required to get video on 4K
 monitor
Date: Tue, 17 Mar 2020 23:31:53 -0400

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:

> Hello,
>
> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>
>> Hello,
>>
>> I installed Guix System on a new machine, which displays on a 4K (3840 x
>> 2160 pixels) monitor.
>>
>> Unless I go to the GRUB command prompt with 'c' at boot and type 'insmod
>> all_video', the video cuts early after booting a GRUB entry with 'No
>> suitable video mode found', or similar.
>>
>> I think we should include this GRUB module in our default GRUB
>> package/configuration.
>>
>> Maxim
>
> I think the attached patches fixes this issue, and makes the
> GRUB configuration a bit simpler too!

Merge to master with commit 6794653e1b.  Closing!

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