On Mon, Feb 29, 2016 at 03:16:08PM +0000, Sharma, Shashank wrote: > Please see the latest mail chain, Sonika has already started on it.
Ah ok, crawling through 1k mails after one week of vacation, so I'm still catching up ;-) My apologies for the confusion. Thanks, Daniel > > Regards > Shashank > > -----Original Message----- > From: Daniel Vetter [mailto:daniel.vetter at ffwll.ch] On Behalf Of Daniel > Vetter > Sent: Monday, February 29, 2016 8:44 PM > To: Sharma, Shashank > Cc: Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; intel-gfx at > lists.freedesktop.org; dri-devel at lists.freedesktop.org; linux-kernel at > vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, Gary C > Subject: Re: [REGRESSION] i915: No HDMI output with 4.4 > > On Wed, Feb 24, 2016 at 06:07:25AM +0000, Sharma, Shashank wrote: > > Hi Ville, > > We will look into this in sometime. Right now team is slightly loaded due > > to project milestone. > > Last time I looked into this, we dint have this HW to reproduce this issue. > > This is an upstream regression. Either you can handle it, or your code must > be reverted again. Please either assign someone for this, or send in the > patch to revert. > > I'll discuss this with Indranil, too. > > Thanks, Daniel > > > > Regards > > Shashank > > -----Original Message----- > > From: Ville Syrjälä [mailto:ville.syrjala at linux.intel.com] > > Sent: Tuesday, February 23, 2016 8:38 PM > > To: Oleksandr Natalenko > > Cc: Vetter, Daniel; intel-gfx at lists.freedesktop.org; > > dri-devel at lists.freedesktop.org; linux-kernel at vger.kernel.org; Daniel > > Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C > > Subject: Re: [REGRESSION] i915: No HDMI output with 4.4 > > > > On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote: > > > Ville, Daniel, > > > > > > any additional info I could provide? I have to return dual-link DVI > > > cable back, so let me know if I could reveal more details if necessary. > > > > Unfortunately I'm out of ideas for now. Daniel is on vacation. > > Anyone else? VPG folks should take the ball here since they broke it. > > > > In the meantime I think as a workaround I think you could use something > > like video=HDMI-A-1:e on the kernel command line (not sure I got the > > connector name right for your system). I think that should result in the > > live status check to be skipped, at least when populating the mode list. > > > > Might be a good idea to collect all the information here and put in a bug > > report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the > > logs and such would be in one place. > > > > > > > > Regards, > > > Oleksandr > > > > > > 16.02.2016 14:54, Daniel Vetter напиÑав: > > > > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote: > > > >> Ville, Daniel, > > > >> > > > >> I've just got another monitor and another DVI-HDMI cable, and > > > >> here what I've got. > > > >> > > > >> ===Single Link DVI-D cable with 3 different monitors=== > > > >> > > > >> Computer DVI âââ DVI-D (Single Link)/HDMI cable âââ HDMI > > > >> LG > > > >> 23MP65HQ-P === not working > > > > > > > > I presume the above LG screen is what you've called previously > > > > "old monitor"? > > > > > > > >> Computer DVI âââ DVI-D (Single Link)/HDMI cable âââ HDMI > > > >> LG > > > >> 23MP67HQ-P === not working Computer DVI âââ DVI-D (Single > > > >> Link)/HDMI cable âââ HDMI LG 23MP55HQ-P === works! > > > >> > > > >> ===Dual Link DVI-D cable with monitor that doesn't work with > > > >> Single Link cable=== > > > >> > > > >> Computer DVI âââ DVI-D (Dual Link)/HDMI cable âââ HDMI LG > > > >> 23MP65HQ-P === works! > > > > > > > > Funky. Can you pls grab the debug logs (with the special patches > > > > from > > > > Ville) for this case? I wonder why suddenly different cable and it > > > > works. > > > > > > > > Also: Is this one of these older-ish screens where you must have a > > > > dual-link cable to drive it at full resolution&refresh rate? > > > > -Daniel > > > > > > > > > > > >> ===Laptop with HDMI output=== > > > >> > > > >> Laptop HDMI âââ HDMI/HDMI cable âââ HDMI LG 23MP65HQ-P === > > > >> works! > > > >> > > > >> I'd say that single link DVI cables are broken with new kernel, > > > >> but one of monitors could work with such a cable. So I have no idea :(. > > > >> > > > >> Regards, > > > >> Oleksandr. > > > >> > > > >> 15.02.2016 17:42, Daniel Vetter wrote: > > > >> >The other downside is that it'll make us non-compliant, which > > > >> >was the point of this entire ordeal: HDMI spec forbids us from > > > >> >starting any i2c transactions when the hpd isn't signalling a present > > > >> >screen. > > > >> > > > > >> >So maybe we need to buy one of these broken screens. > > > >> > > > > >> >Oleksandr, what exact model are you using? And any chance that > > > >> >you could test this on some other machine with intel gfx and > > > >> >latest kernel, just to make sure this really is some issue with > > > >> >the sink and not with the machine itself? And I guess you've > > > >> >tested with some other hdmi sink, and that works? > > > > -- > > Ville Syrjälä > > Intel OTC > > -- > Daniel Vetter > Software Engineer, Intel Corporation > http://blog.ffwll.ch -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
