Bug#1128661: grub-efi: Using GRUB_GFXMODE to get decent resolution may render system ubootable

[Eric Valette]

Package: grub-efi
Version: 2.14-2
Severity: important

With grub 2.14 I get a default 640x480 resolution while it was much less than that
with grub 2.12. without having anything set in GRUB_GFXMODE in /etc/default/grub

On a large monitor the actual default value is not acceptable!

See bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1119955

Trying to get back to 1920x1080 via GRUB_GFXMODE=1920x1080 The system
was unbootable while still not having the desired resolution. I have no clue on how
to get possible resolution for EFI framebuffers so maybe the value is incorrect but still.

I had to manually reinstall which is painfull due to bug

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1119959

Both bugs have been open since early november and nothing fixed! What the use of
providing alpha version to test and taking time to report bugs?

lspci | grep VGA
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 24 [Radeon RX 6400/6500 XT/6500M] (rev c1)
50:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raphael (rev c5)



xrandr
Screen 0: minimum 16 x 16, current 2560 x 1440, maximum 32767 x 32767
DP-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 698mm x 393mm
   2560x1440     59.91*+
   1920x1440     59.90  
   1600x1200     59.87  
   1440x1080     59.87  
   1400x1050     59.86  
   1280x1024     59.89  
   1280x960      59.94  
   1152x864      59.78  
   1024x768      59.68  
   800x600       59.86  
   640x480       59.38  
   320x240       59.29  
   1920x1200     59.88  
   1680x1050     59.85  
   1440x900      59.89  
   1280x800      59.81  
   1152x720      59.75  
   960x600       59.63  
   928x580       59.88  
   800x500       59.50  
   768x480       59.38  
   720x480       59.71  
   640x400       59.20  
   320x200       58.14  
   2048x1152     59.90  
   1920x1080     59.88  
   1600x900      59.82  
   1368x768      59.88  
   1280x720      59.86  
   1024x576      59.90  
   864x486       59.45  
   720x400       59.27  
   640x350       59.28  

-- System Information:
Debian Release: forky/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.74 (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE
Locale: LANG=fr_FR.UTF8, LC_CTYPE=fr_FR.UTF8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages grub-efi depends on:
hi  grub-common     2.14-2
ii  grub-efi-amd64  2.14-2

grub-efi recommends no packages.

grub-efi suggests no packages.

-- no debconf information