On Mon, Jan 06, 2014 at 06:41:28PM +0100, Philipp Zabel wrote: > Hi Eric, > > Am Freitag, den 03.01.2014, 12:14 -0700 schrieb Eric Nelson: > > This is an issue we've seen before. The SABRE Lite board has > > a voltage divider on the HPD pins and some monitors (esp. DVI > > monitors) either don't drive things high enough to assert HPD or > > bounce with connect/disconnect. > > Yes, I used a DVI monitor. > > > We've instrumented our 3.0.35 kernels to use the RX_SENSE bits > > instead. > > Reacting to RX_SENSE0 instead of HPD seems to work. However, it's non-compliant, because HPD can be lowered and raised by the sink when it changes its EDID data (eg, because you're connected through a switch and the routing has been changed.) So, reacting to RX_SENSE0 instead of HPD has to be a work-around enabled only for those boards which are broken in this regard. -- FTTC broadband for 0.8mile line: 5.8Mbps down 500kbps up. Estimation in database were 13.1 to 19Mbit for a good line, about 7.5+ for a bad. Estimate before purchase was "up to 13.2Mbit". _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
