Changing Resolution on VGA Console

jimp

I would just add the lines at the end of the file, even if they result in a repeat. The last line will win. And it's easier to remember how to maintain them that way.

Otherwise it should be fine.

Steve_B

I use this shell script:

#!/bin/sh

# Add the required screen resolution stuff to boot/devices.hint

if (! grep hint.sc.0.vesa_mode /boot/device.hints >/dev/null ) ; then
   echo "hint.sc.0.flags=\"0x180\"" >>/boot/device.hints
   echo "hint.sc.0.vesa_mode=\"279\"" >>/boot/device.hints
   echo "Video mode set. Please reboot"
else
   echo "Mode 279 already set. Reboot required?"
fi

guardian

@jimp:

I would just add the lines at the end of the file, even if they result in a repeat. The last line will win. And it's easier to remember how to maintain them that way.

Thanks Jim… good to know... didn't know you could do that... I agree... much easier to see custom changes and no need to remove the original lines.

Thanks Steve_B for the shell script idea... I had to modify it for my use, so I made a couple of tweaks to make it was easier to read and change.

In the spirit of sharing here's the modified version in case it is of use to anybody.

#!/bin/sh

# Add the required screen resolution stuff to boot/devices.hint

if (! grep hint.sc.0.vesa_mode /boot/device.hints >/dev/null ) ; then
   {
   echo '#'
   echo '#' Custom Modifications:
   echo '#' Set 160x64 Screen Resolution
   echo '#' 
   echo 'hint.sc.0.flags="0x11a"'
   echo 'hint.sc.0.vesa_mode="282"'
   } >>/boot/device.hints
   echo "Video mode set. Please reboot"
else
   echo "Mode 282 already set. Reboot required?"
fi

guardian

It didn't work! Here's my modified file:

/boot/device.hints

# $FreeBSD$
hint.fdc.0.at="isa"
hint.fdc.0.port="0x3F0"
hint.fdc.0.irq="6"
hint.fdc.0.drq="2"
hint.fd.0.at="fdc0"
hint.fd.0.drive="0"
hint.fd.1.at="fdc0"
hint.fd.1.drive="1"
hint.atkbdc.0.at="isa"
hint.atkbdc.0.port="0x060"
hint.atkbd.0.at="atkbdc"
hint.atkbd.0.irq="1"
hint.psm.0.at="atkbdc"
hint.psm.0.irq="12"
hint.sc.0.at="isa"
hint.sc.0.flags="0x100"
hint.uart.0.at="isa"
hint.uart.0.port="0x3F8"
hint.uart.0.flags="0x10"
hint.uart.0.irq="4"
hint.uart.1.at="isa"
hint.uart.1.port="0x2F8"
hint.uart.1.irq="3"
hint.ppc.0.at="isa"
hint.ppc.0.irq="7"
hint.atrtc.0.at="isa"
hint.atrtc.0.port="0x70"
hint.atrtc.0.irq="8"
hint.attimer.0.at="isa"
hint.attimer.0.port="0x40"
hint.attimer.0.irq="0"
hint.wbwd.0.at="isa"
hint.acpi_throttle.0.disabled="1"
hint.p4tcc.0.disabled="1"
#
# Custom Modifications:
# Set 160x64 Screen Resolution
#
hint.sc.0.flags="0x11a"
hint.sc.0.vesa_mode="282"

I rebooted the system, and nothing changed…. same 80x25 (at least I had that and not a blank screen or worse a hung system).

When the reboot is done I still have to drop to the shell and enter vidcontrol MODE_282 to get the screen back to high resolution.

As background:

The output from vidcontrol -i mode reads (copied to paper an retyped):

  mode#       flags  type    size       font      window        linear buffer
282 (0x11a) 0x0000000f G 1280x1024x16 D 8x16 0xa0000000 64k 64k 0xc0000 2560k

I noticed that there are several lines above it that have
T 80x25 8x8 0xb8000000 32k 32k 0x00000000 32k

There are also some other smaller graphic modes where the character following the resolution is one of C 2 4 P or V instead of D and buffer size is 32k.

Any idea why it isn't working?

My guess is that it's using text mode (dumb terminal emulated by the graphics card) for the low resolution, and a graphical driver for the high resolution and it uses a much more complex driver to do that graphics work… and that driver isn't an option during boot... but that's just a guess.

Most important what do I do about it?

doktornotor

You've probably missed this part:

On 2.4 you'll have to manually set kern.vty=sc in loader.conf.local to continue using the vidcontrol method.

guardian

@doktornotor:

You've probably missed this part:

On 2.4 you'll have to manually set kern.vty=sc in loader.conf.local to continue using the vidcontrol method.

I'm still running 2.3.3-RELEASE (amd64) - so that's not the issue now…. unless this setting is required for 2.3.

I did forget to make a note of this, so I need to make a note when I get around to upgrading. Thanks.

reb00tz

@jimp said in Changing Resolution on VGA Console:

There are a few different things you can do, depending on your version.

On 2.4 you'll have to manually set kern.vty=sc in loader.conf.local to continue using the vidcontrol method.

You can set the mode on bootup by adding something like this to /boot/device.hints
hint.sc.0.flags="0x180"
hint.sc.0.vesa_mode="279"
That will get overwritten on upgrade though, so remember to put that back.

As this came up in one of the top Google search results when looking for "pfsense console size", I will provide what worked for me:

Referencing the FreeBSD sc manual (specifically the "Driver Flags" section):

/boot/device.hints

hint.sc.0.flags="0x0080"
hint.sc.0.vesa_mode="324"

/boot/loader.conf.local

kern.vty=sc

Sergei_Shablovsky

@jimp said in Changing Resolution on VGA Console:

There are a few different things you can do, depending on your version.

On 2.4 you'll have to manually set kern.vty=sc in loader.conf.local to continue using the vidcontrol method.

You can set the mode on bootup by adding something like this to /boot/device.hints
hint.sc.0.flags="0x180"
hint.sc.0.vesa_mode="279"
That will get overwritten on upgrade though, so remember to put that back.

Carefully reading this 4 links

https://forums.freebsd.org/threads/changing-screen-resolution.60979/
https://www.reddit.com/r/PFSENSE/comments/fbuukj/how_to_change_monitor_resolution/
https://www.freebsd.org/cgi/man.cgi?query=vidcontrol&sektion=1&format=html
https://docs.freebsd.org/en/books/handbook/book/#consoles

But still have no clear vision how to achieve my goal: see 1024x768 (or 1280x1024) on my monitor.

P.S. Need to note, not all of cards for remote servers management (like iRSC in IBM, iRMC in Fujtsu-Siemens, iDRAC in Dell) able to capturing or redirect on-screen video with resolution that exceeds 1600 ×1200, many has upper limit 1280 × 1024, and very old (7-10years age) models have 1024x768 24/32bit color depth limit.
So, in case when SysAdmin need both remote control thru the BMC card AND control thru local monitor simultaneously, I need to be able to set VGA resolution one from this 3 variants:
1024 x 768
1280 x 1024
1600 x 1200

Sergei_Shablovsky

Any opinions or suggestions?

rcork

@sergei_shablovsky hint.sc.0.flags should be "0x0080" for VESA, not "0x180", per the man page here: https://www.freebsd.org/cgi/man.cgi?query=sc&sektion=4

So for mode 279 (1024x768x16), in /boot/device.hints it should be

hint.sc.0.at="isa"
hint.sc.0.flags="0x0080"
hint.sc.0.vesa_mode="0x117"

and in /boot/loader.conf make sure you have

kern.vty=sc