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Gennady2016-06-20 18:24:35
Debian
Gennady, 2016-06-20 18:24:35

How to reduce screen resolution in TTY console?

Hello. When booting Debian Jessie, the GRUB menu appears in normal resolution (1024x768), and then the video mode changes and the resolution goes to the maximum - the text becomes very small.
Intel GMA 3650 video card.
Used kernel module for the video card:

# lspci -nnk | grep -i vga -A3 | grep 'in use'
        Kernel driver in use: gma500

Output from hwinfo --framebuffer | grep mode
Model: "Intel(R)XX Graphics Controller"
  Mode 0x033c: 1920x1440 (+1920), 8 bits
  Mode 0x034d: 1920x1440 (+3840), 16 bits
  Mode 0x033a: 1600x1200 (+1600), 8 bits
  Mode 0x034b: 1600x1200 (+3200), 16 bits
  Mode 0x035a: 1600x1200 (+6400), 24 bits
  Mode 0x0307: 1280x1024 (+1280), 8 bits
  Mode 0x031a: 1280x1024 (+2560), 16 bits
  Mode 0x031b: 1280x1024 (+5120), 24 bits
  Mode 0x0305: 1024x768 (+1024), 8 bits
  Mode 0x0317: 1024x768 (+2048), 16 bits
  Mode 0x0318: 1024x768 (+4096), 24 bits
  Mode 0x0312: 640x480 (+2560), 24 bits
  Mode 0x0314: 800x600 (+1600), 16 bits
  Mode 0x0315: 800x600 (+3200), 24 bits
  Mode 0x0301: 640x480 (+640), 8 bits
  Mode 0x0303: 800x600 (+832), 8 bits
  Mode 0x0311: 640x480 (+1280), 16 bits

The contents of the /etc/default/grub file:
GRUB_DEFAULT=0
GRUB_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT=1
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash vga=0x0318 video=LVDS-1:d rootflags=data=writeback"
GRUB_CMDLINE_LINUX=""
GRUB_GFXMODE=1024x768x32

If you add a line at the end of the /etc/modprobe.d/fbdev-blacklist.conf file (with this line, the vga= parameter in /etc/default/grub is ignored):
blacklist gma500_gfx
Run the command:
update-initramfs -u -k all
and reboot, then when the system boots, the resolution does not increase and remains sane (1024x768).
Tell me, please, is it possible to reduce the screen resolution in the TTY console without blacklisting the gma500_gfx module?

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nathanael, 2016-06-20
@sferg1985

It is not necessary to reduce the resolution, you can increase the fonts:
dpkg-reconfigure console-setup

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