GRUB 2 Bad Screen Res

[g2geo94]

Okay, I'm at my wit's end here. The past four days I've been trying to install a proper tri-boot system, with Ubuntu and Fedora (on separate attempts) holding the bootloader. They both use Grub 2. Whenever I install the system, each one tries to install Grub properly, but fails to set a proper screen resolution.
Now if I had my old ViewSonic, this wouldn't bother me as that thing can display an extremely wide range of resolutions -clearly or not-. Anyways, my Dell LCD requests 1920x1080 @ 60Hz whenever Grub 2 bootloader should be displaying.

Yes, I've searched around on forums. All over Google, with varying keywords including (but not limited to) Grub 2, Ubuntu, Fedora, Screen Resolution, No Display, etc.

As a result and thus far, the best bit of advice I've received is to edit the grub file in /etc/default/, which I brought up lacking the

#GRUB_GFXMODE=

line. Upon my addition of the line with my proper screen mode, I still had no luck in getting display. As last ditch efforts, I have tried backing the resolution at GRUB using Ctrl+Alt+Backspace and Ctrl+Shift+Backspace, unsure of which key combo used to send the screen res to default signal.

Also, I feel the need to mention that my monitor has proven to display the default console resolution.

If anyone here has ANY further suggestions, PLEASE tell me. Thank you in advance.

-Geoffrey

[glennzo]

Have you seen DBelton's suggestion in this thread?

[PabloTwo]

Hello Geoffrey, and welcome to the forum.

Well, thet fact that you're dealing with grub2 tells us that you have F15 or higher, but when posting for help, it is greatly helpful to the folks who might offer help if you would also mention which specific release of Fedora you're dealing with.

If you added a line "#GRUB_GFXMODE=some_resolution" to the /etc/default/grub file, two things:

1) Beginning a line with "#" makes it a comment line, which is ignored.
The line needs to be "GRUB_GFXMODE=some_resolution", without the leading # character.

2) Any edits to the /etc/default/grub file are not activated until after you then run, as root:

grub2-mkconfig -o /boot/grub2/grub.cfg

The actual grub2 config file settings are in /boot/grub2/grub.cfg. Running the grub2-mkconfig command as shown above reads the entries in /etc/default/grub and applies them to the /boot/grub2/grub.cfg file. It also runs all the scripts in the /etc/grub.d/ directory.

Also, you do not necessarily need to attempt (and probably shouldn't) to make your grub2 menu screen jump to the full native resolution of your LCD monitor. Something smaller will work just as well. My LCD monitor has a native resolution 1920x1080, but in my /etc/default/grub file, my entry is this:

GRUB_GFXMODE=1440x900x16
GRUB_GFXPAYLOAD_LINUX=keep

Even with a smaller than "native" resolution, 1440x900 requires using a larger font size, otherwise the font would appear tiny. the "x16" part is optional, and sets the color bit depth (it could be 8, 16, 24 or 32).

Once you boot into your desktop session, your session can set the final graphics resolution to use.

[g2geo94]

Thank you, Pablo2, your response is the help I've been seeking, as it does clear the air of some uncertainties I had been having about Grub's config. I was aware of the comment symbol (#) and had gotten rid of it, but had no idea of the required command to execute afterwords.
Also, I do apologize for neglecting to supply the version of Fedora I was running, normally I do try and provide such information. xP
For record's sake, the version is 17, x86_64.

Alright, after completing the steps you have provided, I was able to reboot and finally see the screen that has been ever hidden from my view. Thanks again. Everything is finally at peace once more with my system.