[Bug 73362] New: [intel gm965] TV-out not working

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73362

          Priority: medium
            Bug ID: 73362
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [intel gm965] TV-out not working
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: matthew.khouzam at gmail.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Hello, 

I have isolated a bug, I think with the intel driver no longer supporting
tv-out (svideo/component/composite) on newer kernels.

The problem appears to be in drivers/gpu/drm/i915/intel_tv.c, in "void
intel_tv_init(struct drm_device *dev)" (line 1550 approx)

the function tv_is_present_in_vbt return 0 so it aborts at this line. 
if (!tv_is_present_in_vbt(dev)) {
                 DRM_DEBUG_KMS("Integrated TV is not present.\n");
                 return;
        }

Upon inspecting the function static int tv_is_present_in_vbt(struct drm_device
*dev), the device enumeration only cycles through the lvds and the vga out. 

As a stop-gap for my htpc, I just changed the return value of that function to
1 and now everything works well for me, but this is a duct tape fix and not
kernel worthy.

I hope this helps, at this point my better half is using the htpc and it would
be very dangerous to my wellbeing if I reboot with the old kernel and
drm.debug=0x6.

Thanks,

Matthew

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