Bug 85936 - Black Screen on Tv after setting deep_color=1
Summary: Black Screen on Tv after setting deep_color=1
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/Radeon (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: xf86-video-ati maintainers
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-11-05 20:13 UTC by madafa
Modified: 2019-11-19 07:48 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Attachments

Description madafa 2014-11-05 20:13:51 UTC
I have Panasonic TX-P42ST60E tv and when I set deep_color=1 and reboot I have normal picture on tv and monitor durring boot but after turning on Xorg I get only black screen on tv (monitor connected to DVI works as usual) and tv's OSD is constantly switch back and forth between '16:9' and 'Just'.

Do I need special cable or tv for working deep color? Does deep color is the same as full rgb?
Comment 1 Andy Furniss 2014-11-05 23:01:41 UTC
(In reply to madafa from comment #0)
> I have Panasonic TX-P42ST60E tv and when I set deep_color=1 and reboot I
> have normal picture on tv and monitor durring boot but after turning on Xorg
> I get only black screen on tv (monitor connected to DVI works as usual) and
> tv's OSD is constantly switch back and forth between '16:9' and 'Just'.

You should add your dmesg output so people can see what card/chip you have.

> Do I need special cable or tv for working deep color? Does deep color is the
> same as full rgb?

You don't need a special cable and it's not the same as rgb.

OSS drivers only do RGB over HDMI, but my older Panasonic converts this into 422 - it still does (well advertises) deep color.

Your newer model may not do this, but it also may need the right settings in the menus to really get rgb.

Deep color isn't that usable anyway as xorg etc work in 8 bit  AFAIK you need to go out of your way = patching and using special software to really use it.
Comment 2 Martin Peres 2019-11-19 07:48:49 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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