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I'm using my phone right now because I completely lost access to my Z510 laptop running 14.04 (Trusty Tahr), I had no problem using my laptop, everything worked fine and I was really enjoying it for a while just before I had this temptation to install the videogame Dota 2 which runs on an independent client known as steam.

This is where the problem actually appears: software runs but asks that the user must install three packages, namely,

libgl1-mesa-dri:i386, libg1-mesa-glx:i386 and libc6

I checked synaptic for these packages, successfully found them and install them, they also automatically removed some other packages under the architecture amd64, I thought to myself that I have a 4th gen i7 CPU, so this kind of changing may be good for performance by what its name has to offer. After installing them (and removing others) I went to Nvidia settings tried to switch to my GF 740m graphic card, I encountered an error, so decided to reboot the machine and here I am, the purple frozen screen.

Can I do something about it? may I somehow acces to my stored data (some of them are pretty necessary)? Can I repair the OS using a live usb/dvd ubuntu image? what do you suggest? Thanks in advance

Ashkan Ranjbar
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i386 is 32-bit, amd64 is 64-bit, it has nothing to do with the CPU manufacturer. You needed to enable multiarch and add the i386 architecture in order to install the 32-bit libraries.

since 32-bit and 64-bit libraries often conflict, you likely removed the 64-bit version of the libraries you installed. Mesa is your graphics library.

try booting in recovery mode and see if you can get a command prompt to reverse the changes you made.

ravery
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