Re: [Intel-gfx] The mysterious case of IRQs, failed DP aux ch transactions, and Skylake

2016-03-01 Thread Runyan, Arthur J
Hi Lyude, I like mysteries, but DP and docks usually ends up as a sob story. The master interrupt control doesn't have any hardware connection to DP aux. I don't know how much confidence you have in the IRQ check, but it seems likely that an interrupt, probably hotplug, triggered programming to

[Intel-gfx] The mysterious case of IRQs, failed DP aux ch transactions, and Skylake

2016-03-01 Thread Lyude
Hi! Daniel Vetter referred me to you since you're a hardware guy, and also suggested I include the whole intel-gfx list on this. So as of late I've been testing the mainline kernel on some new production Skylake machines. While it worked perfectly on most of them, I've been stumped with a weird is