Screen Size Problem

[david359]

Running RHEL 7 Server on VirtualBox, I'm using only CLI no GUI. After installing guest addintions and test them and by that I mean even the GUI everything works fine, but when I return to CLI, because I use only that environment the size of the screen is still small. Can anyone tell me how can I increase window size? I try changing the setting ( Preferences -> Display ), but nothing work out.

[socratis]

If you mean you want to change the default 80x24, that's not what the guest additions enable you to do. Frankly I don't know if there's a way to change that. If you want to simply see things bigger, try the scaling option. But this will simply "zoom in" the display, won't actually change the screen resolution.

[mpack]

You can enable scale mode and then resize the window I think.

I had a quick look at the source code to see if non standard (>80x25) text modes are provided, and it looks like not.

[Martin]

In older Linux versions the text mode screen size was controlled with the 'vga=xxx' parameter on the kernel line in the bootloader config.

[mpack]

In older Linux versions the text mode screen size was controlled with the 'vga=xxx' parameter on the kernel line in the bootloader config.

Yep, but it's already set to the largest display size the BIOS supports - that's what I checked.

[david359]

Well thanks for the answers. It locks like I need have to move to VM Workstation.

[Perryg]

Running RHEL 7 Server on VirtualBox, I'm using only CLI no GUI. After installing guest addintions and test them and by that I mean even the GUI everything works fine, but when I return to CLI, because I use only that environment the size of the screen is still small. Can anyone tell me how can I increase window size? I try changing the setting ( Preferences -> Display ), but nothing work out.

You change the guests framebuffers to be able to use the size you want. Various guests use different approaches but I have found that they all have instructions on how to achieve this by searching Google. Martin is correct for some you simply add a comment to the bootloader, and some use the grub config to set it.

[david359]

Hello, after doing some reading across grub documentation I found out that all I have to do in this case is just to add thees three line in /etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="splash xvga=<here is the resolution of the screen in format ( number X number X buffer )>"
GRUB_GFXMODE=<here is the resolution of the screen in format ( number X number X buffer )>
GRUB_GFXPAYLOAD_LINUX=keep

Everyone thanks for the help.