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I know it's a little vague, but. I really need your help.

I have Ubuntu 12.10 on Dell Latitude E5520 i5 2410M with 4GB RAM & 500 GB HDD. With Firefox (16.0.2) it is extremely frustrating to do anything - even when I now opened the about dialog - it took 3 seconds. Occasionally when I type this message the GUI freezes. By the way, the HDD light on the laptop is on about 50% of the time. Simplest tasks can take few seconds - accessing a folder for the first time, viewing images, browsing the Dash menu, and even working in terminal seems to stress the computer to it's limit. Needless to say I am not running any heavy software - just Firefox and some folders..

I should also note that 2 months ago everything was ok. I went traveling then for 6 weeks, and it seems that since I came back - it started.

I added the 'free' and 'top' output, if anything else is needed please let me know. Thanks!

Here is free:
             total       used       free     shared    buffers     cached
Mem:       4029164    3212280     816884          0     110620    2343148
-/+ buffers/cache:     758512    3270652
Swap:      1998844          0    1998844

and top:

top - 13:49:03 up 47 min,  2 users,  load average: 0.94, 1.35, 1.42
Tasks: 198 total,   2 running, 196 sleeping,   0 stopped,   0 zombie
%Cpu(s):  2.2 us,  0.6 sy,  0.0 ni, 81.6 id, 15.6 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:   4029164 total,  3246036 used,   783128 free,   110816 buffers
KiB Swap:  1998844 total,        0 used,  1998844 free,  2381608 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND           
 3551 elad      20   0  689m 272m  35m S   4.9  6.9   1:52.08 firefox           
 3601 elad      20   0  253m  36m  18m S   2.6  0.9   0:22.42 plugin-containe   
 1207 root      20   0 40292  15m 5064 S   1.1  0.4   1:34.47 Xorg              
 2467 elad      20   0  275m  87m  30m S   0.8  2.2   0:55.01 compiz            
 3589 elad      20   0 80016  12m 9848 S   0.8  0.3   0:03.64 unity-webapps-c   
 2426 elad      20   0  6064 3020  772 S   0.5  0.1   0:04.03 dbus-daemon       
 3903 elad      20   0  103m  15m  11m S   0.5  0.4   0:01.74 gnome-terminal    
 2528 elad      20   0 38796 2600 2176 S   0.2  0.1   0:00.18 gvfs-afc-volume   
 2666 elad      20   0  105m  18m  11m S   0.2  0.5   0:11.49 unity-panel-ser   
 2770 elad      20   0 43816 6984 5632 S   0.2  0.2   0:00.30 mission-control   
 3510 root      20   0     0    0    0 S   0.2  0.0   0:00.33 kworker/0:2       
 3643 elad      20   0 80064  12m 9924 S   0.2  0.3   0:00.93 unity-webapps-c   
 3901 root      20   0     0    0    0 S   0.2  0.0   0:00.13 kworker/u:2       
 3963 elad      20   0  5204 1392 1012 R   0.2  0.0   0:00.22 top               
    1 root      20   0  3720 2164 1316 S   0.0  0.1   0:00.62 init              
    2 root      20   0     0    0    0 S   0.0  0.0   0:00.00 kthreadd          
    3 root      20   0     0    0    0 S   0.0  0.0   0:00.41 ksoftirqd/0   
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2 Answers 2

If you experience this problem mostly when using Firefox, try disabling "Global Menu Bar integration" from Firefox add-ons. This, supposedly, is a more common issue if you have a lot of bookmarks. I had a very similar problem, and disabling that add-on fixed it for me.

Bug that I refer to > https://bugs.launchpad.net/ubuntu/+source/unity/+bug/987060

If you notice Firefox, unity-panel-service and hud-service taking up a lot of RAM and CPU, this is likely your problem. I noticed that your resources seem to be fine in what you posted, but that is only an instantaneous report and might not be an accurate account.

Hope that helps.

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Well I'd take a wild guess and say you installed it using wubi.exe on windows 7 OS. If so, you may manage to solve your problem by something that worked exquisitely for me. Namely, removing your Ubuntu 12.10 via use of uninstall.exe in the file directory /ubuntu (of course backing up all your files prior to doing so) and then inserting a live CD, rebooting and booting from CD. (Pressing F12 if this option doesn't come up automatically)

Incidentally if you need to create a live CD just install the .iso file from http://www.ubuntu.com/start-download?distro=desktop&bits=32&release=latest for 32 bit OS and http://www.ubuntu.com/start-download?distro=desktop&bits=64&release=latest for 64 bit OS and burn it to a CD with ~800MB free space.

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I do not have Windows OS on my laptop.. just linux –  Elad Nov 1 '12 at 12:20
    
Well then as far as my knowledge goes you're flipped, sorry. I'll let someone else field this question. Just leaving my answer here because I'm sure there's some people with a similar question that may read your question so its worth leaving this answer here. –  Brenton Horne Nov 2 '12 at 6:32

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