bugGNU GRUB - Bugs: bug #51750, multiboot: grub ignores...


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bug #51750: multiboot: grub ignores gfxpayload=keep

Submitted by:  Stas Sergeev <stsp>
Submitted on:  Mon 14 Aug 2017 02:19:50 PM UTC  
Category:  Terminal Severity:  Major
Priority:  5 - Normal Item Group:  Software Error
Status:  None Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Open Release: 
Release:  Git master Reproducibility:  Every Time
Planned Release:  None

Mon 14 Aug 2017 03:56:10 PM UTC, comment #5:

Please find it attached.
With a lot of distro-specific noise, as usual.

(file #41518)

Stas Sergeev <stsp>
Mon 14 Aug 2017 03:52:52 PM UTC, comment #4:

Please paste your whole grub.cfg

Vladimir Serbinenko <phcoder>
Project Administrator
Mon 14 Aug 2017 03:50:58 PM UTC, comment #3:

So I swapped the strings to look like this:

menuentry 'KOS_64' {
multiboot /boot/x86_64-vmkos.img
set gfxmode=1024x768x32
set gfxpayload=keep

But this didn't change anything.
The menu has correct mode, but
OS is loaded with the mode from EDID.
I think the related code is in grub_video_vbe_setup()
and grub_vbe_get_preferred_mode(). I don't
see where they looks elsewhere but EDID.

Stas Sergeev <stsp>
Mon 14 Aug 2017 02:27:46 PM UTC, comment #2:

It was before.
Never thought this matters.
Will try swapping them.

Stas Sergeev <stsp>
Mon 14 Aug 2017 02:22:50 PM UTC, comment #1:

Is your gfxpayload=keep before or after multiboot command ? Later one takes precedence

Vladimir Serbinenko <phcoder>
Project Administrator
Mon 14 Aug 2017 02:19:50 PM UTC, original submission:

Sorry for the duplicate, but I don't seem to
be able to re-open the original ticket #51466.

If the multiboot header requests the
gfx mode using the appropriate flag,
but the mode parameters are set to 0
for auto, grub seems to be taking the
mode from EDID, ignoring the gfxpayload=keep.

Stas Sergeev <stsp>


Attached Files
file #41518:  grub.cfg added by stsp (2KiB - application/octet-stream - grub.cfg)


Depends on the following items: None found

Items that depend on this one: None found


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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2017-08-14 stsp Attached File- => Added grub.cfg, #41518

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