[Nouveau] [Bug 60680] New: HDMI is connected and has mode, TV says "no signal"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60680

          Priority: medium
            Bug ID: 60680
          Assignee: nouveau at lists.freedesktop.org
           Summary: HDMI is connected and has mode, TV says "no signal"
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: ppaalanen at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 74633
  --> https://bugs.freedesktop.org/attachment.cgi?id=74633&action=edit
kernel log with nouveau.debug=trace, v3.8-rc5-51-g4f84a11

TV does not receive signal when connected via HDMI to my Asus G50V laptop.
Laptop is single-GPU, NV96. xrandr shows HDMI as connected, having a mode, and
it should just work but doesn't. TV does not detect a signal.

LVDS works just fine.

I have tried:
- switching HDMI on and off via xrandr
- setting different video modes with xrandr for the HDMI
- booting with and without HDMI cable connected
- hotplugging HDMI

DDX 1.0.6.
Kernel is the nouveau kernel based on 3.8.0-rc5, v3.8-rc5-51-g4f84a11
commit 4f84a118d8872f21e1d5b78241e0e6f31b79e46b
Author: Marcin Slusarz <marcin.slusarz at gmail.com>
Date:   Tue Feb 5 20:44:19 2013 +0100

    drm/nouveau/therm: reduce stack usage of nouveau_therm_ic_ctor


The nvidia proprietary drivers can run the TV via HDMI fine.

This is the first time I am trying to run nouveau with HDMI on this machine.

In the kernel log at timestamp 93, I was in X and ran:
$ xrandr --output LVDS-1 --auto --output HDMI-1 --auto --right-of LVDS-1
Before that X had seemed to set up a clone mode at the laptop panels resolution
also on TV.


Similar bugs:
#37085 - I do not know if my case is a regression, different chips.
#43939 - I am using a real TV, not a DVI monitor.
#56601 - I have not even attempted audio yet, video only.

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