No system timer interrupt on some ATI chipsets
|Reported by:||euan||Owned by:||mmu_man|
It seems like some motherboards with ATI chipsets don't route IRQs normally through the PIT. My HP laptop stalls unless I press keys or move the mouse to generate interrupts.
Laptop is HP6715b (ATI Xpress 1250) My Desktop with Asus A8R-MVP mobo is also affected. (ATI CrossFire™ Xpress 1600 chipset)
Linux prints the following clues:
ATI board detected. Disabling timer routing over 8254.