> I've tried to be slightly lazy than in my previous mail and quickly > tested this on my snb here: Bit 23 in SDEISR (0xc4000) is set when the > cable is plugged in, and cleared when nothing is plugged in. Afaict it > works as advertised. Note tha the SDE irq definitions nicely > differentiates between "active high pulse" type interrupts and "active > high level" interrupts. The hpd irq sources are all of the level type. OK, so this is more complicated than I realized. For whatever reason this bit does not work with all monitor configurations. Thanks for clarifying the expected behavior. Stuart
