[xubuntu-users] Unexpected hard drive trashing

Václav Zeman vhaisman at gmail.com
Sun Oct 21 09:07:09 UTC 2012


On 10/20/2012 11:43 PM, Vincent Trouilliez wrote:
> Hi there,
> I was using XUbuntu 12.04, now just upgraded to XUbuntu 12.10, first
> via network update out of convenience, but noticed some problems and
> regressions, so I re-installed it, this time using a physical CD-ROM
> and erasing the System partition, but preserving my Home partition.
> Unfortunately this did not improve a thing, so I am now posting here....
> One problem per post so here is one: hard drive trashing.
> 1) during boot it's a long and uninterrupted hard drive symphony : is
> there some file/app caching/pre-read going on.. that I could disable,
> by any chance ?
> 2) once the desktop is loaded/ready, soon after I sometimes noticed a
> single and long drive trashing coming out of nowhere, nothing related
> to my activity on the computer at least. Has anyone noticed it ? I
> seem to remember 12.04 did some background file indexing that I had to
> disable, but forgot what it was exactly and how I disabled it...
> anyone could remind me ?
> 3) The weirdest case is this third one though : launch the "Sudoku"
> game that comes pre-installed with XUbuntu. Now grab the window bar
> with the mouse and move around the window : so long as the window is
> in motion, the hard drive is going nuts !
I can reproduce this as well. I have tried to "debug" this and I think
that it is the dconf-service. See the attached picture. Whenever I do
the Sudoku window moving action the top window starts showing
dconf-service in D state.

> 4) I installed Gnome's system monitor (why not). In normal
> circumstances, you would get only a limited hard drive activity when
> you start it for the first time, and then it would run from RAM so
> would start instantly without any drive activity. But here I am having
> a weird behaviour : I get noticeable hard drive trashing wheneever I
> CLOSE it ! I can start it 20 times in a row and it would yield to zero
> drive activiy while starting, which is expected, but sure enough the
> 20 times that I will close it, it will cause a good bit a hard drive
> trashing.  I noticed something just as weird in some recent release of
> (vanilla) Ubuntu, about Rhythmbox: whenever I operated RB's built-in
> volume control slider, I would get massive hard drive trashing so long
> as the cursor of the volume control was moving. Drive would stop
> instantly as soon as I stopped moving the cursor, then resume again as
> soon as move the cursor again.. completely weird.  Thankfully this
> problem went away with XUbuntu 12.04, and still absent from 12.10. 
> May it stay that way !
> Any clues about the above ?


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