Thanks Tom but the problem wasn't the discs, I've had some success. It's a case of multi problems, I think my PC has a grudge.
Problem #1: no keyboard/mouse with 64 bit distros Reason: IOMMU support was enabled in the BIOS, this was enabled to try and fix #2 Problem #2: NVidia driver is unstable on a Grub2+EFI+64bit system The fix was supposed to be disable the graphics that grub uses. This causes #3 Problem 3#: Changing the grub settings I discribed means that you can't see the boot screen - not a feature I'm comfortable with and stops booting if the boot process needs user input. Solution: ? On Saturday 05 Jan 2013 14:16:13 you wrote: Hello all, I need some help. My system has become unbootable. It was working fine with EFI booting until I set the following in /etc/default/grub.conf GRUB_GFXPAYLOAD_LINUX=text GRUB_GFXMODE=auto I then ran update-grub2 When I reboot grub says: "error: invalid video mode specification 'text' "booting in blind mode" the system then hangs indefinatly after a brief flash from the harddrive. It may be waiting for a password for an encrypted volume I have but i wont repond to "S" or "Esc" keypresses I've tried adding set gfxpayload=true|keep|false - none of which work Ive tried adding set gfxmode=640x480 The kubuntu boot cd wont load properly and 12.04 has broken keyboard / mouse support. this is driving me mad! How can I undo the changes I made at the commandline? Does anyone know a good efi rescue system? I have a MSI 990FXA-GD65 (version E7640AMS V19.9) The system only has Kubuntu 12.10 installed on ssd with gpt
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