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After some effort, can't change grub screen resolution

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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.

(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)

returns:

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.

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

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Thread

After some effort, can't change grub screen resolution Lance Simmons <simmons.lance@gmail.com> - 2018-06-29 08:00 +0200
  Re: After some effort, can't change grub screen resolution Michael Lange <klappnase@freenet.de> - 2018-06-29 10:10 +0200
  Re: After some effort, can't change grub screen resolution Felix Miata <mrmazda@earthlink.net> - 2018-06-29 11:30 +0200
  Re: After some effort, can't change grub screen resolution Darac Marjal <mailinglist@darac.org.uk> - 2018-06-29 11:40 +0200
    Re: After some effort, can't change grub screen resolution Lance Simmons <simmons.lance@gmail.com> - 2018-06-29 18:20 +0200

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