[Bug 30325] New: video=1280x720@50 no longer works

[Bug 30325] New: video=1280x720@50 no longer works

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=30325

           Summary: video=1280x720@50 no longer works
           Product: DRI
           Version: DRI CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: marius.groeger@web.de


With the current drm-radeon-testing my grub cmdline option video=1280x720@50 no
longer works (RS780, output to LCD TV via HDMI). The fbcon apparently is
enabled, but the TV doen't get a displayable picture anymore. Booting with
d-r-t from 6 weeks ago works and correctly uses the EDID reported 1280x720@50
mode.

I did ask the same thing on the dri-devel mailing list and received no answer
so I'm filing this bug both as another humble nudge to the authors of the drm
video= code, and as a more persistent reminder of the issue.

Thanks
Marius

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[Bug 30325] video=1280x720@50 no longer works

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https://bugs.freedesktop.org/show_bug.cgi?id=30325

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2010-09-24 10:29:36 PDT ---
Can you bisect what commit broke it?  I suspect it's something in the common
drm code.

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[Bug 30325] video=1280x720@50 no longer works

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https://bugs.freedesktop.org/show_bug.cgi?id=30325

--- Comment #2 from Marius Groeger <marius.groeger@web.de> 2010-09-27 10:13:16 PDT ---
(In reply to comment #1)
> Can you bisect what commit broke it?  I suspect it's something in the common
> drm code.

Well my point was to ask the people who where involved in recent changes to the
drm code to thínk what commit might have broken this. The amount of commits is
very large and I was hoping for help to shortcut. All I know is that it broke
between d-r-t 2010-08-02 2046h and 2010-09-09 1910h.

I did check commit adde0f23396fe6c6cd4fe8e66e9cdc7d1f5081d9 but that doesn't
seem to be the cause.

How do I determine a git base version if I only have a date/time?

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[Bug 30325] video=1280x720@50 no longer works

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=30325

--- Comment #3 from Marius Groeger <marius.groeger@web.de> 2010-09-29 01:58:39 PDT ---
(In reply to comment #1)
> Can you bisect what commit broke it?  I suspect it's something in the common
> drm code.

There's FAR to many commits involved as during this interval the
2.6.35->2.6.36-rc merged happened. So I'm stuck. With the current d-r-t it
seems even worse, I even don't get an X display anymore. (Haven't checked the
logs though, yet).

For the second time (the last issue was a latency problem due to excessive drm
locking.) I'm hitting a major drm regression and can't do anything about it.
This is very disappointing. So, what can we do about it in the future?

As there are no regression tests, the testing is done by the community. Would
it be possible to increase the frequency of updates to d-r-t? Or stay closer to
the current linus tree?

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[Bug 30325] video=1280x720@50 no longer works

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https://bugs.freedesktop.org/show_bug.cgi?id=30325

--- Comment #4 from Marius Groeger <marius.groeger@web.de> 2010-10-14 07:11:51 PDT ---
This is getting weirder and weirder. With the current d-r-t there are no 50Hz
modes available anymore AT ALL!

Tried setting the TVStandard option - no change.

Started X without xorg.conf - no change.

Manually adding the 50Hz modes with xrandr works, but wasn't necessary in the
past.

What logs would be interesting for further investigation?

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[Bug 30325] [RADEON:KMS:RS780:MODESET] video=1280x720@50 no longer works

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https://bugs.freedesktop.org/show_bug.cgi?id=30325

Jerome Glisse <glisse@freedesktop.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|video=1280x720@50 no longer |[RADEON:KMS:RS780:MODESET]
                   |works                       |video=1280x720@50 no longer
                   |                            |works

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[Bug 30325] [RADEON:KMS:RS780:MODESET] video=1280x720@50 no longer works

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https://bugs.freedesktop.org/show_bug.cgi?id=30325

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> 2011-02-09 08:55:42 PST ---
This was a apparently due to a drm core change:
https://bugzilla.kernel.org/show_bug.cgi?id=21542

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[Bug 30325] [RADEON:KMS:RS780:MODESET] video=1280x720@50 no longer works

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https://bugs.freedesktop.org/show_bug.cgi?id=30325

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #6 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

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

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/159.

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