2015-12-04 09:53 keltezéssel, Christian König írta: > On 04.12.2015 00:26, cpaul@xxxxxxxxxx wrote: >> From: Lyude <cpaul@xxxxxxxxxx> >> >> HPD signals on DVI ports can be fired off before the pins required for >> DDC probing actually make contact, due to the pins for HPD making >> contact first. This results in a HPD signal being asserted but DDC >> probing failing, resulting in hotplugging occasionally failing. >> >> This is somewhat rare on most cards (depending on what angle you plug >> the DVI connector in), but on some cards it happens constantly. The >> Radeon R5 on the machine used for testing this patch for instance, runs >> into this issue just about every time I try to hotplug a DVI monitor and >> as a result hotplugging almost never works. >> >> Rescheduling the hotplug work for a second when we run into an HPD >> signal with a failing DDC probe usually gives enough time for the rest >> of the connector's pins to make contact, and fixes this issue. >> >> Signed-off-by: Lyude <cpaul@xxxxxxxxxx> > > I find a second a bit long, but if it works so what? > > Looks sane enough to me, patch is Reviewed-by: Christian König <christian.koenig@xxxxxxx> Does this patch help in case of the Radeon chip only has HDMI and DP outputs exposed (Zotac ZBOXNANO-AQ01) but used with DVI or VGA monitors with converter cables? We have some problems with such scenarios that sounds eerily similar to this description. Inquiry-by: Zoltán Böszörményi <zboszor@xxxxx> ;-) Thanks in advance. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
