I recently wrote a post here about not being able to use a live cd or usb as it would always freeze just after showing the screen (though the cursor still responded to motion).
Since then I have done the only other possible thing. I downloaded the Alternate CD on my 40KB/s line (what a mission). I created a bootable usb with usb-creator-gtk. this didn't work, so i opened it up and moved the files so that they could be found on boot. (usb-creator is clearly useless). So then I finally started installing ubuntu. This was wonderful. Upon completion I realised I hadn't installed a desktop manager.
So I did
apt-get install ubuntu-desktop to get lightdm and unity and whatever else makes up the desktop manager. Then I restarted. And.... It loaded the login screen and, just like the live cd and live usb, then decided to freeze and not respond to anything i do with keyboard or mouse.
In my opinion this seems to be a clear problem with the desktop manager that is probably used on the live cd and the full install. But how on earth do I fix it.. I was running Gutsy before this, but after using Natty and then Oneiric on my laptop, I decided it was worth backing up, formatting and starting afresh on my 3-year old pc. But I've now been stuck for days with only Windows 7 which is not ideal.
The only real error messages I could see in logs were of the form
usb 7-1: device descriptor read/64, error -71,
usb 7-1: device not accepting address 5, error -71 and
hub 7-0:1.0: unable to enumerate USB device on port 1. But if you tell me which logs to look in I will tell you what they say and be very appreciative for any help.
Some extra info: - Windows 7 is installed as well (same disk, different partition) - quad core intel CPU - nvidia geforce gtx 295 - 4GiB RAM (checked with memtest)
I was just scouring
/var/log/kernel.log and found a few lines of the form:
[drm] nouveau 0000:04:0.0: PFIFO_DMA_PUSHER - Ch 2 Get 0xffffffffc Put 0x0000fffff8 IbGet 0x00000065 IbPut 0x00000066 State 0xc0042056 (err: MEM_FAULT) Push 0x00400040
which seems like a problem to me given the
MEM_FAULT parts and they are the last lines.. I can't imagine my video memory has a problem though as the card works perfectly in Windows.