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Re: After some effort, can't change grub screen resolution

On Fri, Jun 29, 2018 at 12:49:53AM -0500, Lance Simmons wrote:
  I want to change grub screen resolution.
  Four facts:
  (1) "vbeinfo" and "videoinfo" return no result in grub.  The screen blanks and eventually I restart the computer.

This /probably/ means that grub doesn't know how to control your video device.
  (2) "hwinfo --framebuffer" returns no result.  I would append the logfile, but it's 7500 lines long.
  (3) running

lspci  -v -s  $(lspci | grep ' VGA ' | cut -d" " -f 1)

  00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics
  Controller (rev 35) (prog-if 00 [VGA controller])
  Subsystem: ASRock Incorporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller
  Flags: bus master, fast devsel, latency 0, IRQ 121
  Memory at 90000000 (64-bit, non-prefetchable) [size=16M]
  Memory at 80000000 (64-bit, prefetchable) [size=256M]
  I/O ports at f000 [size=64]
  [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
  Capabilities: [d0] Power Management version 2
  Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
  Capabilities: [b0] Vendor Specific Information: Len=07 <?>
  Kernel driver in use: i915
  Kernel modules: i915
  (4) So far, changing GRUB_GFXMODE (in /etc/default/grub) to several of the resolutions I know my monitor supports (and then
  running "sudo update-grub") has no effect.

Just as a wild stab-in-the-dark, have you tried GRUB_GFXMODE=auto ? This is the default when using gfxterm, though, so you've probably already got the best grub can do.

One thing that you don't mention, which could be potentially useful is how your computer boots. Is it BIOS (in which case you have grub-pc installed) or (U)EFI (in which case you have grub-efi-ia32 or grub-efi-amd64 installed)? UEFI brings easier access to higher resolutions, so if you have the option to switch to that, it may be beneficial.

  Any suggestions?
  I've been running sid for a year, but this has been a problem since I got the computer a couple of years ago and was running
  stable so I figure it's not sid-specific.
  Lance Simmons

For more information, please reread.

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