Grub2 and framebuffer

[vortex7]

In order not to have problems on upgrades, to set the console graphics mode,
I considered this as a customization and added the following lines at the end of
/etc/grub.d/40_custom

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# Set console mode (equivalent to kernel parameter vga=791)
  set gfxpayload=1024x768x16

and it works perfect [after an update_grub]

Other vga mode numbers mappings can be found in
http://en.wikipedia.org/wiki/VESA_BIOS_Extensions
under the "Linux video mode numbers" section.

My grub2 version is 1.98~20091229-1

Famelis George

[dbbolton]

GFXPAYLOAD is supported by grub 1.97

Do not edit /boot/grub/grub.cfg.

In /etc/default/grub find the line:

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GRUB_GFXMODE=1440x900@32

underneath that line insert:

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GRUB_GFXPAYLOAD=1440x900x32

then in /etc/grub.d/00_header find the line:

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if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1440x900x32 ; fi

then insert

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if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1440X900x32 ; fi

below it.
In the same file, but farther down the page, find the line:

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set gfxmode=${GRUB_GFXMODE}

insert below that line:

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set gfxpayload=${GRUB_GFXPAYLOAD}

Now run

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 # update-grub2

Substitute your own screen resolution for mine.

Thanks for sharing this. It worked perfectly with my laptop, but not on my desktop, due to my own negligence:

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 grep -n GFX /etc/grub.d/00_header 
38:if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1440x900x32 ; fi
39:if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1440X900x32 ; fi
81:  set gfxmode=${GRUB_GFXMODE}
82:  set gfxpayload=${GRUB_GFXPAYLOAD}
 

It took me a minute or two to spot it.

[Jack450]

Can anyone help me with this problem too I've follow the steps to getting the Virtual Console to change resolution but I'm still getting the same low resolution. My grub changed to 1440x900 but not the Console when I press Ctrl+Alt+F2, does anyone know what I'm doing wrong?

[dbbolton]

Can anyone help me with this problem too I've follow the steps to getting the Virtual Console to change resolution but I'm still getting the same low resolution. My grub changed to 1440x900 but not the Console when I press Ctrl+Alt+F2, does anyone know what I'm doing wrong?

Look for errors like I did

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grep -n GFX /etc/default/grub

grep -n GFX /etc/grub.d/00_header

You should see something like

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16:GRUB_GFXMODE=1024x768x32
17:GRUB_GFXPAYLOAD=1024x768x32

and

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38:if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1024x768x32 ; fi
39:if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1024x768x32 ; fi
81:  set gfxmode=${GRUB_GFXMODE}
82:  set gfxpayload=${GRUB_GFXPAYLOAD}

only "1440x900x32" in your case.

[Raffles10]

Can anyone help me with this problem too I've follow the steps to getting the Virtual Console to change resolution but I'm still getting the same low resolution. My grub changed to 1440x900 but not the Console when I press Ctrl+Alt+F2, does anyone know what I'm doing wrong?

All I had to do was:

edit: /etc/grub.d/00_header

From line 81 you need to add 'set gfxpayload=keep' to show:

if loadfont `make_system_path_relative_to_its_root ${GRUB_FONT_PATH}` ; then
set gfxmode=${GRUB_GFXMODE}
set gfxpayload=keep
insmod gfxterm

Then edit: /etc/default/grub

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=1440x900x32

and then:

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$ sudo update-grub

[Jack450]

Wow that was quick, don't go anymore I'm going to test this XD

[Jack450]

Damn, it didn't change anything I'm still getting the same result.

[Jack450]

Can anyone help me with this problem too I've follow the steps to getting the Virtual Console to change resolution but I'm still getting the same low resolution. My grub changed to 1440x900 but not the Console when I press Ctrl+Alt+F2, does anyone know what I'm doing wrong?

Look for errors like I did

Code: Select all

grep -n GFX /etc/default/grub

grep -n GFX /etc/grub.d/00_header

You should see something like

Code: Select all

16:GRUB_GFXMODE=1024x768x32
17:GRUB_GFXPAYLOAD=1024x768x32

and

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38:if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1024x768x32 ; fi
39:if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1024x768x32 ; fi
81:  set gfxmode=${GRUB_GFXMODE}
82:  set gfxpayload=${GRUB_GFXPAYLOAD}

only "1440x900x32" in your case.

Hmm When I type "grep -n GFX /etc/grub.d/00_header" I'm missing "82: set gfxpayload=${GRUB_GFXPAYLOAD}".

[dbbolton]

Hmm When I type "grep -n GFX /etc/grub.d/00_header" I'm missing "82: set gfxpayload=${GRUB_GFXPAYLOAD}".

Then that's your problem.

then in /etc/grub.d/00_header find the line:

Code: Select all

if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1440x900x32 ; fi

then insert

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if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1440X900x32 ; fi

below it.
In the same file, but farther down the page, find the line:

Code: Select all

set gfxmode=${GRUB_GFXMODE}

insert below that line:

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set gfxpayload=${GRUB_GFXPAYLOAD}

[Jack450]

Hmm When I type "grep -n GFX /etc/grub.d/00_header" I'm missing "82: set gfxpayload=${GRUB_GFXPAYLOAD}".

Then that's your problem.

then in /etc/grub.d/00_header find the line:

Code: Select all

if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1440x900x32 ; fi

then insert

Code: Select all

if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1440X900x32 ; fi

below it.
In the same file, but farther down the page, find the line:

Code: Select all

set gfxmode=${GRUB_GFXMODE}

insert below that line:

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set gfxpayload=${GRUB_GFXPAYLOAD}

I switched it out but it didn't work either.

[dbbolton]

I switched it out but it didn't work either.

You don't need to switch anything. You need to add the line.

[Jack450]

I switched it out but it didn't work either.

You don't need to switch anything. You need to add the line.

It was first "set gfxpayload=${GRUB_GFXPAYLOAD}"
but I followed what Raffles10 said and switched it to
"set gfxpayload=keep" either way both do not change the resolution on the Virtual Console.

[un1xer]

Hi, sorry for waking this old thread but it seemed there was no point in starting a new one.
So, unfortunately none of the above works for me, I used to set my FB resolution by editing
/boo/grub/grub.cfg with:

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set gfxpayload=1680x1050x32

now it does't seem to work any more.
The changelog of the latest update v1.98-1 of grub-pc says that it now has support GRUB_GFXPAYLOAD_LINUX, how is one supposed to use this?
Thanks for any help you can provide on this.

[llivv]

.

[un1xer]

All I get is a black screen, after gdm starts and doing Ctrl+Alt+F1 gets me a also a black screen, sometimes there is the Debian boot loader logo all distorted.
So, X starts fine, is just the frame buffer that gets unusable.
If I set al to defaults I get the normal 640x480 frame buffer.

[llivv]

.

[un1xer]

Are you using them your self?
My graphics card is an nvidia 9300gs on a laptop.

[llivv]

.

[m_l]

After a recent update to grub-pc [1.98-1] you can set the framebuffer resolution with the following option in:

/etc/default/grub:

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GRUB_GFXPAYLOAD_LINUX=tty/console-resolution

Just use the resolution you will like to use of course, for example:

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 # Set the framebuffer resolution; used on tty/console [text consoles]
GRUB_GFXPAYLOAD_LINUX=1920x1200

After editing, make sure to create a new /boot/grub/grub.cfg to use the option above:

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# update-grub2

So if you are using this version or newer, the previous steps are not needed any more. Just do the above.

[m_l]

When I used the nvidia driver, installed using the wiki instructions. I had to add the following to /etc/modules for framebuffer to work right:

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nvidiafb

I now use the nv driver and the above is still there, not sure if it's needed with nv. But I still have nvidiafb there and all works fine.