HDMI TV doesn't work over HDMI cable

HDMI TV doesn't work over HDMI cable

[Dmitry Nezhevenko]

Hi,

I've got some really strange issue. I've followed GPU within ASUS MB:

00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12)

I'm trying to attach HDMI TV to it. My motherboard has both HDMI and DVI
outputs. So when I'm using DVI output together with cheap DVI->HDMI cable,
everything works. But once I switch to HDMI->HDMI, display is detected,
but display nothing. TV shows "No signal" message.

I've tried to compare xrandr output for both cases and it looks same:

--- dvi/randr   2012-04-14 20:54:03.000000000 +0300
+++ hdmi/randr  2012-04-14 20:57:29.000000000 +0300
@@ -1,6 +1,8 @@
 Screen 0: minimum 320 x 200, current 1360 x 768, maximum 8192 x 8192
 VGA1 disconnected (normal left inverted right x axis y axis)
-HDMI1 connected 1360x768+0+0 (normal left inverted right x axis y axis)
160mm x 90mm
+HDMI1 disconnected (normal left inverted right x axis y axis)
+DP1 disconnected (normal left inverted right x axis y axis)
+HDMI2 connected 1360x768+0+0 (normal left inverted right x axis y axis)
160mm x 90mm
    1360x768       60.0*+
    1920x1080      50.0     60.0     30.0     25.0     24.0  
    1280x720       50.0     60.0  
@@ -11,8 +13,6 @@
    720x480        59.9  
    640x480        72.8     75.0     66.7     60.0  
    720x400        70.1  
-DP1 disconnected (normal left inverted right x axis y axis)
-HDMI2 disconnected (normal left inverted right x axis y axis)
 HDMI3 disconnected (normal left inverted right x axis y axis)
 DP2 disconnected (normal left inverted right x axis y axis)
 DP3 disconnected (normal left inverted right x axis y axis)

(Looks like HDMI1 means DVI on my MB and HDMI2 means HDMI).

Here is link to Xorg.log for both cases:

http://dion.org.ua/uploads/2012/04/xorg_dvi.log
http://dion.org.ua/uploads/2012/04/xorg_hdmi.log

Any ideas why I can't connect TV using HDMI? I'm pretty sure that TV is
ok as well as HDMI cable. Also same TV works when connecting to laptop
with GMA4500 over HDMI.

xserver-xorg    1:7.6+12
xserver-xorg-core       2:1.11.4-1
xserver-xorg-input-evdev        1:2.7.0-1
xserver-xorg-video-fbdev        1:0.4.2-4+b2
xserver-xorg-video-intel        2:2.18.0-2
xserver-xorg-video-vesa 1:2.3.1-1

-- 
WBR, Dmitry

Re: HDMI TV doesn't work over HDMI cable

[Eugeni Dodonov]

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On Sat, Apr 14, 2012 at 15:08, Dmitry Nezhevenko <dion@inhex.net> wrote:

> Hi,
>
> I've got some really strange issue. I've followed GPU within ASUS MB:
>
> 00:02.0 VGA compatible controller: Intel Corporation Core Processor
> Integrated Graphics Controller (rev 12)
>
> I'm trying to attach HDMI TV to it. My motherboard has both HDMI and DVI
> outputs. So when I'm using DVI output together with cheap DVI->HDMI cable,
> everything works. But once I switch to HDMI->HDMI, display is detected,
> but display nothing. TV shows "No signal" message.
>

Hi,

could you open a bug on this and attach those Xorg log files together with
the 'dmesg' output when booting with the 'drm.debug=0xe' kernel parameter?
And also your kernel version? The
http://intellinuxgraphics.org/how_to_report_bug.html has a nice summary on
how to collect all the data we need.

One thing that would certainly help is if you could attach the diff between
running 'intel_reg_dumper' with DVI and HDMI connections (running it over
ssh for example, if you don't have any valid output with HDMI). The 'no
signal' message means that we are sending TV data that it does not
understands, but there are many possible cases why it could happen..
Intel_reg_dumper should give us a summary of what bits and registers could
be wrong.

-- 
Eugeni Dodonov
<http://eugeni.dodonov.net/>

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Re: HDMI TV doesn't work over HDMI cable

[Dmitry Nezhevenko]

On Sun, Apr 15, 2012 at 12:27:00PM -0300, Eugeni Dodonov wrote:
> could you open a bug on this and attach those Xorg log files together with
> the 'dmesg' output when booting with the 'drm.debug=0xe' kernel parameter?
> And also your kernel version? The
> http://intellinuxgraphics.org/how_to_report_bug.html has a nice summary on
> how to collect all the data we need.

Hi,

I've added all of this: https://bugs.freedesktop.org/show_bug.cgi?id=48740

> One thing that would certainly help is if you could attach the diff between
> running 'intel_reg_dumper' with DVI and HDMI connections (running it over
> ssh for example, if you don't have any valid output with HDMI). The 'no
> signal' message means that we are sending TV data that it does not
> understands, but there are many possible cases why it could happen..
> Intel_reg_dumper should give us a summary of what bits and registers could
> be wrong.
> 

Output looks same :(

--- reg_dumper_dvi.txt  2012-04-15 22:31:26.548920891 +0300
+++ reg_dumper_hdmi.txt 2012-04-15 22:31:31.212984536 +0300
@@ -150,8 +150,8 @@
                    FDI_RXB_IIR: 0x00000000
                    FDI_RXB_IMR: 0x000000ff
                       PCH_ADPA: 0x00f40018 (disabled, transcoder A, +hsync, +vsync)
-                         HDMIB: 0x80000adc (enabled pipe A 8bpc TMDS HDMI audio enabled +vsync +hsync detected)
-                         HDMIC: 0x0000001c (disabled pipe A 8bpc SDVO DVI audio disabled +vsync +hsync detected)
+                         HDMIB: 0x00000adc (disabled pipe A 8bpc TMDS HDMI audio enabled +vsync +hsync detected)
+                         HDMIC: 0x8000025c (enabled pipe A 8bpc SDVO HDMI audio enabled +vsync +hsync detected)
                          HDMID: 0x0000001c (disabled pipe A 8bpc SDVO DVI audio disabled +vsync +hsync detected)
                       PCH_LVDS: 0x40000000 (disabled, pipe B, 18 bit, 1 channel)
                      CPU_eDP_A: 0x00000018

I've added to bugreport that over HDMI cable TV doesn't work even in
BIOS/GRUB screen. Maybe it's intended or maybe not...
 
Thanks

-- 
WBR, Dmitry