Can't explore file system anymore

[Accinson]

Hi everyone,
i have posted my problem in the absolute beginner section before (here).Now i think it's time to post my issue in a more specific forum section.

As you can see from my last post,part of my problem has been resolved (thanks to N.N.),but it seems i'm continuing to have issues...
I can see all the desktop and panel icons,i can click them,but when i do that the system hungs,until it informs me that the window browser is not responding and i have to "force quit" it...
After that,i'm not able to do anything (even to log out properly).

As suggested by N.N. i created a new user:using this new user,things work properly.So i could use this new user,but i would like to know how to fix my original user's environment...

Can you please help?

[Accinson]

Anyone?

[corevette]

which version of Ubuntu are you running?
after you installed Ubuntu, did you download/install any graphics card drivers?
which graphics card do you have?
did this start happening right after you installed ubuntu?

[Accinson]

I'm running 8.04,which i've upgraded from 7.10.
When i had 7.10 on,i had installed Envy,so it's not a recent update.
My graphics card is an ATI Mobility Radeon (i think an HD2600,but i'm not 100% sure ,cause i'm not at my laptop right now).

I exclude that the problem is due to the Hardy upgrade,since i did it like 2 weeks ago.The last day the laptop was working i hadnt touch anything clearly related to graphics,but i played a bit with samba (i wanted to learn more about it),modifying some stuff.

Just an additional info:during various attempts to fix xserver,i noticed that the system warns me about the modprobe.d file,saying something like "items blacklisted wil be ignored".

[Thanoulis]

Envy in 7.xx is quite different from the Envy in 8.04...
Maybe you installed xgl-xserver?

[Accinson]

Well,i didn't explicitly install xgl-xserver (but i don't remember if i installed it as a required dependency).

Maybe,then,i should upgrade to the new version of Envy?
What sounds strange,though,is that i have this problem not immediately after the 8.04 upgrade.Maybe some related update caused that? (i remember that during the last "working" session i did some upgrade)