I have a Toshiba Satellite m305d-s4829 that I purchased about 5 months ago. On 4 separate occasions, now, I have blue screened and gotten an error message that says drive_power_state_failure. In looking around forums and such, it is suggested that this is possibly a problem between Vista and my graphics card. Does anyone have any suggestions on whether or not this is actually the cause? Regardless, does anyone know how to resolve this problem? It keeps happening at the most inopportune moments, such as when I was taking an online final for a history class... Thanks!

Here's a copy of the error report:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: 9f
BCP1: 0000000000000003
BCP2: FFFFFA8006459050
BCP3: FFFFFA80065EC790
BCP4: FFFFFA80055AA280
OS Version: 6_0_6001
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\Mini122008-01.dmp
C:\Users\annaleah\AppData\Local\Temp\WER-40950-0.sysdata.xml
C:\Users\annaleah\AppData\Local\Temp\WERF6EB.tmp.version.txt