[Bug 38170] New: LG TV shows no signal attached to radeon via HDMI (and is improperly detected)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=38170

           Summary: LG TV shows no signal attached to radeon via HDMI (and
                    is improperly detected)
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: kugel at rockbox.org
         QAContact: xorg-team at lists.x.org


When I attach my TV (LG 26LE5500) via HDMI, it is detected as '7" Goldstar
Company Inc.' device, but xrandr seems to list the correct resolutions.

Worse though is that the TV shows no signal, it even says "No Signal" on the
screen. This of course means I cannot attach my TV.

I don't know if it matters, but I'm using GPU switching via vgaswitcheroo.

Steps to reproduce:
0. Switch to radeon discrete graphics and restart X.
1. Attach TV via HDMI
2. Configure resolution
3. See no signal on the TV

Actual Result:
No signal/black screen on TV

Expected Result:
Desktop viewable on TV

Build Date & Platform:
I tried various Linux distributions, most of them with
xserver-xorg-video-radeon 6.14 and kernel 2.6.38, i.e. Ubuntu 10.10 and 11.04,
Linux Mint 10 and 11, Linux Mint DE, Fedora 15. All showed the same result.

Prod me if you need more information or if I can help debugging. I'm an
experienced programmer for that matter.

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