Thread: boot-repair fail after upgrade from 12.04 to 12.10

hello,
have instability issues after recent upgrades (i don't know ones might responsible) in 12.04. i've checked memory memtest86+, scanned hard disk, , checked other possible hardware issues lm-sensors. nothing has come up. failures seem related graphics, i'm not sure how. compiz crashing frequently, ran ubuntu 2d hoping stability. helped in sense x didn't fail completely. when computer crashes programs may still , running firefox, isn't possible else @ all. don't think hardware issue, because memtest86+ ran night without difficulty. when ubuntu running, os crashes somewhere on 50 minutes regularity, whether or not i'm logged ubuntu desktop. updating kernel 3.2 3.5 did not help. neither did fresh install of ubuntu 12.04 live cd.
last thing i'm trying install ubuntu 12.10 fresh in place of 12.04, , hope can solve problem. i've done this, won't boot @ all. i've looked @ message boards , tried boot-repair, twice now, did not work me. http://paste.ubuntu.com/5668730
first selected /boot (/dev/sdb1) installation of grub, , /home (/dev/sda). have tried booting grub-rescue prompt described http://askubuntu.com/questions/19783...b-rescue-crash can't past "ls" stage: every command type returns either "error: bad filename" or "error: file not found".
have intel core i7 24g ram , nvidia gt200 geforce gtx260 gfx card. if upgrading doesn't work next step contemplating replace graphics card, although don't have strong basis believe problem.
can provide.

i not think boot-repair installs drivers btrfs or xfs. may able install drivers , see partitions. boot-repair if cannot boot.

have installed nvidia drivers?
, 12.10 have install headers first.
# may need headers first - meta package 12.10 version:
sudo apt-get install linux-headers-generic

re: how install nvidia drivers [v8.1.2.12 bogan]. post 1126
http://ubuntuforums.org/showthread.p...43535&page=113
https://help.ubuntu.com/community/bi...erhowto/nvidia
http://ubuntuforums.org/showthread.php?t=2081649


btrfs, not ready prime time
http://ubuntuforums.org/showthread.php?t=2111487
ext4 still leads on btrfs file-system on linux 3.8
http://www.phoronix.com/scan.php?pag...rfs_ext4&num=1

i-series systems needed boot parameters.

gigabyte ga-x79-ud3 i7-3820
needed f6 set acpi=off , nomodeset
pci=nomsi or acpi=off
quiet splash vt.handoff=7 rootdelay=90 reboot=a,w

running optimus? or dual video?

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