Posted 28 July 2010 - 04:50 PM
I have had this problem for awhile - the screen dims and brightens, dims and brightens, constantly, but in the past this would occur briefly and on reboot be fine for several months. I am using the high performance power setting and it happens whether I am plugged in or running on battery. My screen res is 1280 x 800 and the refresh rate is 60 hz (the Intel graphics media accelerated driver for mobile interface does not seem to allow me to change the refresh rate!?).
This week this has become a constant problem. It seems to have started after I downloaded an updated Intel wireless driver. The only things other recent changes are that I recently went through a thorough and successful malware removal process using the forum here, and, since then Windows (and possibly unrelated), on shutdown and startup, attempts to install updates, but this process fails (I assume it fails because it attempts to update every single time, with the same message, which I will try to get down and edit into this post on next shutdown/login).
Here are my pc/op system specs:
Windows Vista Home Premium (on an HP Pavillion dv6000 laptop)
Service Pak 2
Intel® Core2 Duo CPU T5250 @ 1.5 Ghz
2.0 GB RAM
32 bit operating system
Mobile Intel® 965 Express Chipset Family
Let me know if there is other information that would be useful.