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So whilst trying to install you effectively had no internet connection
Same result that myself and friend of mine experienced

No problem at all I was just a little unsure who Tommy was replying too
I think the grub problem that you are seeing is down to lack of internet
Both myself and friend of mine who knows linux FAR better than I do experienced the same issue with the 2.9.8 iso when trying to install with no internet present

I installed LinuxCNC 2.9.8 on a virtual machine a few weeks back. It also failed during the grub installation phase. I'm 99% that at least in my case, something with the automatic network configuration did not work properly, and this caused the grub installation to fail. If I recall correctly, the DNS server was incorrectly set, and I had to manually edit /etc/resolv.conf to put the correct DNS server first.

Boots and works perfectly in live mode. The same system loads and runs Windows XP with zero faults, and will boot and run an old Mandrake linux installer USB with no errors. (OLD! Like kernel 2.2!) Of course, the NIC doesn't work with Mandrake, but everything installs. It won't boot after because of the lack of UEFI support, but it does install.

Depronman, the reason I jumped in on this thread with you is that I think I might also be having a network installation error. I am wondering if it's relying on having internet access to download any missing packages that it needs, and that it's missing a few critical packages if it can't get internet access.

hi,
- is it possible to increase size of buttons for axis control at Axis?
- is it possible to have control of secondary spindles at Axis?

may be I need rewrite something? what? where? how?

/eugenius

Sorry, my previous reply was for Xnke.

I’m not sure who you are replying too, but on my original post about failing the install at grub install, yes I could load the live version without any errors
It was only on any of the install option that it’s failed at grub unless it had access to the internet either wired or Wi-Fi

have anybody make rpi4 working linuxcnc, what need doing gpio pins config, this hal,demo and html not help anything what need doing, not understand what must make, ewer not has written and understand code, only test run "blink" code and working.

just buy rpi4 and encoder wheel, buttons, rotate switch, shift level converter 3,3V to 5V and stepper motor drivers DM556 and nema 23 470 OZ/ 3 Nm motors, and install rpi4 linuxcnc image to card and run image, ok, but were is config wisard gpio pins ?
config wisard has only paraller port pin config.
pnc config has only ower expensive mesa card config.
how config all pins to rpi4 gpio ???? has anybody make this and can tell step by step or send config files what need rpi4 working whit this linuxcnc rpi image.
image boot and run ok, step conf wisard no help how gpio pins setting.

arduino shield can use only toy motors, less than 2A motors can use, not have cnc machine motors too small, normal cnc used nema 23 470 OZ 3Nm motor 3-6Ampere current minimum cnc motors. and not need BOB card use big stepper motor drivers etc, DM556 drivers,

not is problem rpi use 3,3V and then use shift level converter module, cost 1-4 $ about and convert this gpio 3,3V to 5V out, then this 5V can connect wire to stepper motor drivers ETC, DM556.

what this is, not understand lot say hal need write code but not understand anything what code need write, not easy help, lot has only english plaa plaa plaa but no say how use gpio pins linuxcnc rpi4 stepper drivers pins step and dir and enable, paraller port has simple easy but why not rpi4 have same system can add pins and step/dir, number. etc, pin 17 is x axis step, pin 13 is x axis dir, were this is, or not have why not.

i just install rpi4 linuxcnc image to my rpi4 but step conf wisard not have gpio pins can config, how make this, i looking today pnc config but has only mesa card config, no working if need only gpio pins output to stepper driver board DM556. i use gpio pns and shift level converter 3.3V to 5V convert and then 5V can use output to stepper driver, but how config all gpio pins what i need use. step conf wisard not can, pnc config wisard no can its only mesa card conf. how peoples has made rpi gpio run drivers and inputs.

rpi4 boot ok linuxcnc 2.9.x whit my HDMI display but not old VGA display say only out off range 1. rpi used mini HDMI to vga cable and working good normal image raspian, but not whit linuxcnc image .

Does the PC boot and work in live mode?
To many errors, seems like failing memory module or controller....

> that looks like its looking on the cd/DVD. If this is not on installation, edit your sources file to remove the CD/DVD settings

I'm not sure whether the cdrom:// is referencing an actual CD or it's looking on the USB key that I had flashed with the image. I wasn't hearing any attempted access to the DVD drive though that might not mean much. (Do you know?)

The installation worked after I rebooted and ran through the installation from scratch and let the thing have an Internet connection (DHCP lease FWIW) to do what it wanted to do. Going back and reconfiguring the network and package portions without rebooting was not enough to resolve the GRUB installation issue.

Do not use windows editors or office suits for editing machine files.
Use simple text editors such as notepad on windows or mousepad, gedit, nano, geany, etc on Linux.