Vaio FS315M Audio jitters

[andreacarli]

On September I had problem with the system speed and audio jitters. I do a system restore and all work fine until last week when the problem reappear.

In the Vaio Knowledge Base I found an article that describe my problem:
It is caused by the HDD controller that run in PIO mode instead
of DMA mode.

I tryed to switch to DMA mode but it does not work.
I have not make changes to my system or installed any new application.
I don't want to restore the system every month, so anyone know
the cause/solution to this problem?

Thanks,
Andrea

[robpaxton]

Please see this recent thread and see if it helps.

[andreacarli]

Found the solution!

IDE controller work in PIO mode only and there is no way to change it.

Problem shoud be due to Windows XP HDD Compression feature enabled for C: hard drive.

or can be solved removing IDE controller from installed devices and make Windows reinstall in in next reboot.

I don't know what cause the problem between these two options since I fix them at the same time.

Regards