Reliable USB WiFi?

Hi guys,

Obviously MrMurphy was here, disconnected my PC in workshop to work here in my office and my SSD went south.

Works OK with other HDD and non RT LCNC and WiFi is also working.

error: unknown filesystem.
Entering rescue mode...
grub rescue > blinking prompt

Is there a way to rescue?

Found info on Youtube

use this:
1. grub rescue/ set boot=(hd0,msdos5)
2. grub rescue/ set prefix=(hd0,msdos5)/boot/grub
3. grub rescue/ insmod normal
error: unknown filesystem <<<<<<<<<<<<<<<<<<<<< errors our after step 3
4. grub rescue/ normal

ls
(hd0) (hd0,msdos5) (hd0,msdos1) <<<<<<<<<<<< so what to use?

Taking an educated guess I am going to say that

(hd0,msdos5) is your swap partition

(hd0,msdos1) is your root partition

(hd0,msdos1) would be the one you want to deal with

Grub can be a bit of a pain sometimes

This page has some good info: help.ubuntu.com/community/Boot-Repair

As suggested download the boot repair disk from here: sourceforge.net/p/boot-repair-cd/home/Home/

Read the instructions before doing anything and ask any questions if you feel unsure.

Another option would be to boot linuxcnc from a USB stick and try to mount the drive you have been trying to boot from, do not reinstall linuxcnc just boot.

If you need help with that some of the info that will be need is:

sudo cat /proc/partitons

on my machine I get the following output:

major minor #blocks name

11 0 1048575 sr0
8 0 117220824 sda
8 1 30183392 sda1
8 2 2612224 sda2
8 4 84424286 sda4

sr0 is my cdrom/dvdrom
sda is my hdd
sdaX are the partitons

Next run
sudo fidsk -l /dev/yourhdd

which in my case I would run
sudo fdisk -l /dev/sda

which gives me the output:
Disk /dev/sda: 111.8 GiB, 120034123776 bytes, 234441648 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x8ddcfdaf

Device Boot Start End Sectors Size Id Type
/dev/sda1 * 63 60366847 60366785 28.8G 7 HPFS/NTFS/exFAT
/dev/sda2 229216256 234440703 5224448 2.5G 82 Linux swap / Solaris
/dev/sda4 60366848 229215419 168848572 80.5G 83 Linux

This tells me:
/dev/sda1 is my windows partiton (I dual boot)
/dev/sda2 is my swap partiton
/dev/sda4 is my linux partiton

If the numbering seems a little strange I've had several different linux distros install and things have ended up this way, but this is purely an example of the output you can get.

Hopefully there has been no damage to your file system after one of my family members got in there.....yeah I'm "one of those bloody murphys" lol

Downloade Boot-Repair and did run repair.

paste.ubuntu.com/25901798/

Now I get GRUB and boot but a lot of FAILED lines during boot and it is only terminal not graphical.
CNC3000 login:

Can not login

Looks like the file system has some major issues.

When you said your ssd went south what actually happened......did have a power outage or did it just raise it's ugly head ?

I'd be inclined to save any configs you have and any other files you deem to be important and try a reinstall. Things appear to have gone quite bad.

Mostly I try to install /home on a separate partition just in case things go bad and you need to reinstall.

Before trying a reinstall I'd download this: www.system-rescue-cd.org/ have a good read through the docs and run some checks on your ssd.

Smartmontools is on the above mentioned livecd....here's some info www.smartmontools.org/wiki/TocDoc

Good luck mate seems you have hit a bit of a bad bump

It appears to be so yes.

Last week I was trying to get the WiFi working on the issues you so kindly guided me with.
Next is yesterday I just unhook all cables and carry PC to my *lab* and started and there it was = leftovers from MrMurphy

Luckily there is no hard work on LCNC configs done so I will start all over with fresh installation and now on HDD.
I will have the SSD for other things as I do not trust this one any moore.

Thanks for you kind help, much appreciated.

No probs mate, anytime......not all of us Murphys are bad lol

So, I managed to make a new install via WiFi during install process, but now when rebooted into LCNC there is no way to get WiFi working.

So what the f..k is going on here

Just to be sure what PC are you using the office or workshop PC ?

Can you get wifi when running the from live Linuxcnc USB\CD ?

One thing you can try, when grub loads press e to edit, then on the line that loads the kernel add these options, at the end of the line is ok, net.ifnames=0 biosdevname=0