Computer hangs if left untouched for a while

Hi,

Currently I’m experiencing a problem were, if I left my computer untouched for a few minutes it hangs. By hanging I mean no alt tabbing, desktop does not react to clicks, all plasmoids are freezed (wich is nice to see the time it got stuck :)), Ctrl+Alt+F1 gives me a login prompt but after username/password noting more happens, that is, it hangs there too.

I’m starting to suspect hardware problems because I don’t see anything out of the ordinary in the logs. But I don’t really know were to look.

I’ve suspected that my ATI was not reacting well to power management but I turned that off and it still hangs when left alone (the poor thing, who can blame it…). Can wireless problems hang the entire computer? Do you have a suggestion were I might look next to spot the cause?

(Meanwhile I’ll try to do a memtest and badblocks check but that takes for ever …)

Well just an update,

memtest passed all tests and filesystem checking reported everything alright. Here is fschk output (just because I’ve saved it to a file and can easily past it :))


e2fsck 1.40.8 (13-Mar-2008)
Checking for bad blocks (read-only test): done
/dev/sda7: Updating bad block inode.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

/dev/sda7: ***** FILE SYSTEM WAS MODIFIED *****

  117316 inodes used (16.65%)
    1165 non-contiguous inodes (1.0%)
         # of inodes with ind/dind/tind blocks: 8605/80/0
  987683 blocks used (35.11%)
       0 bad blocks
       1 large file

   99067 regular files
   12522 directories
      44 character device files
      64 block device files
      54 fifos
    5570 links
    5406 symbolic links (4877 fast symbolic links)
     150 sockets
--------
  122877 files

e2fsck 1.40.8 (13-Mar-2008)
Checking for bad blocks (read-only test): done
/dev/sda8: Updating bad block inode.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

/dev/sda8: ***** FILE SYSTEM WAS MODIFIED *****

  109374 inodes used (5.17%)
    5306 non-contiguous inodes (4.9%)
         # of inodes with ind/dind/tind blocks: 5999/184/0
 3616546 blocks used (85.68%)
       0 bad blocks
       1 large file

  100426 regular files
    8604 directories
       0 character device files
       0 block device files
       0 fifos
       0 links
     209 symbolic links (51 fast symbolic links)
     126 sockets
--------
  109365 files