[ubuntu] Settings change itself

Every time I attempt to go into my phone settings it says "unfortunately, settings has stoped" I have reset my phone 3 times, held the power button to force reset it, still nothing. Idk what happend but all my settings are wrong and am unable to change them. Any way I can do a factory reset or something without goin in to the settings?

Why is the mouse speed in Ubuntu so insanely fast now? I just installed Ubuntu again today after not using it for a long time and my mouse cursor is blasting across my screen at warp speed, it never did this when I used Ubuntu before. I googled for a solution and using a terminal to change xinput settings helps but I can't get it to feel normal.

I have just installed Gnome-Tweak to customize the theme. Now my whole desktop is reset to factory settings. The shortcuts that I added in the launcher are gone. Colors of fonts have changed.Also i can't change desktop backgrounds. Why is this ..how do I reset Ubuntu to how it was before? Thanks for any help in advance.

I have a Dell Precision M6500 laptop with 2 x 24" dell monitors connected via a docking station.

When I first installed Ubuntu, all networking worked perfectly. After messing with the settings every so often, it slowly became unusable. I would really like to know if there is a way to completely reset network settings without re-installing Ubuntu, DNS settings, proxy settings, everything. I'm running 12.04.

Tweaking Hidden Settings With Ubuntu Tweak On Ubuntu 9.10

I upgraded to 12.04.1 i think it was ( Wasn't really concentrating :P ) And now when i FN DOWN ARROW KEY it shows the little bar going down but the brightness dosn't changer, I go into system settings to change it, still nothing? Anyone got a fix? :)

Right problem is i want use Byobu i really like it BUT i messed up and changed settings in F9 and choose the screen keybindings NOW i cant get back to the F9 settings to change it back and cant use any the F keys for Byobu , its very annoying and cant find a solution anyone care to help with the matter ?

I was with VirginBroadband.com.au (Australia). My huawai 3G Dongle was working great on Ubuntu, However I have changed ISP's.

I unlocked the modem, and put in the new SIM. I have tested this in my Windows PC and it connects to the new (Optus) Network A-OK and it all works.