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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
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I'm currently installing Puppy Linux on an old computer, and everything is working fine, the resolution of the boot selections were looking ok, but the moment Puppy Linux boots the GUI, this happens!!! And I tried resizing from the GRUB terminal but it doesn't work, please help me, thank you!!
That looks like it might be the monitor's own on-screen display rather than anything Puppy related. My guess is that the monitor hasn't been detected properly and Puppy is putting out a resolution that the monitor can't deal with.
Since the message says 1280x1024, either the monitor is 1280x1024 and can't deal with anything else, or it's not 1280x1024 and is being sent 1280x1024 resolution and is complaining about it.
(Or worse, it's a clock frequency error which was a real problem back in the early days of Linux.)
As for how to fix, the answer is going to be different depending on the age of the base Linux under Puppy and the graphical subsystem.
For X/X11/Xorg it's probably going to need use of the
xrandrshell command, perhaps to delete the mode that is causing the problem. For Wayland, it appears that each window manager has its ownxrandrequivalent. I see talk of agnome-randr, for example.To get to a shell in the first place, try the Ctrl+Alt+F1 key-combo. If the computer isn't frozen, that might get a text-based console login prompt. (Puppy might do things differently here though. Not sure.)
Alternatively, look up how to boot to a single-user shell by modifying GRUB options, that is, if no such option is there already.
Caveat: I am no expert. Take this under advisement. Also try web-searching some keywords. It might be there's a really simple fix for this that I don't know about.
thank you so much!!!