lkml.org 
[lkml]   [2016]   [Feb]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [REGRESSION] i915: No HDMI output with 4.4
    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@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@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@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@linux.intel.com]
    > > Sent: Tuesday, February 23, 2016 8:38 PM
    > > To: Oleksandr Natalenko
    > > Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org;
    > > dri-devel@lists.freedesktop.org; linux-kernel@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 написав:
    > > > > 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 ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG
    > > > >> 23MP65HQ-P === not working
    > > > >
    > > > > I presume the above LG screen is what you've called previously
    > > > > "old monitor"?
    > > > >
    > > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG
    > > > >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single
    > > > >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
    > > > >>
    > > > >> ===Dual Link DVI-D cable with monitor that doesn't work with
    > > > >> Single Link cable===
    > > > >>
    > > > >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— 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 ——— HDMI/HDMI cable ——— 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

    \
     
     \ /
      Last update: 2016-02-29 17:21    [W:2.660 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site