[Bug 70207] New: rs690: kernel can't bring lvds in dpms on mode

[Bug 70207] New: rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

          Priority: medium
            Bug ID: 70207
          Assignee: dri-devel@lists.freedesktop.org
           Summary: rs690: kernel can't bring lvds in dpms on mode
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: david.heidelberger@ixit.cz
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

After some time, LVDS display get into off mode in console. After pressing keys
it display stay black. Only way, how to get it working again is using "vbetool
dpms on", then it lights up correctly.

It only applies in console, in X11 session is display powered just fine after
passing event to key/mouse/touchpad.

This behaviour is here for long time, 100% since 3.9 to 3.11.4, but probably
much more (I'd like to test, but it took lot of time).

This is laptop Toshiba A210-15j, RS690 card.

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #1 from David "okias" Heidelberger <david.heidelberger@ixit.cz> ---
In cases STR (using hibernate-ram) within console it work well too.

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #2 from David "okias" Heidelberger <david.heidelberger@ixit.cz> ---
Only difference I noticed is that in X is mode changed
mode 0 => 3 => 0

and in pure KMS console it's
mode 0 => 1 => 0

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #3 from David Heidelberger (okias) <david.heidelberger@ixit.cz> ---
When issuing: "vbetool dpms on" without touching keys, screen goes just pure
white. After pressing button, screen goes off again.

Seems like it goes from "any_state -> off" instead of "any_state -> on".

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> ---
The driver only knows two states: on and off.  All of the other intermediate
dpms states other than on map to off in the driver.  Note that vbetool goes
behind the drivers back and messes with the hardware so it's likely to cause
problems.

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #5 from David Heidelberger (okias) <david.heidelberger@ixit.cz> ---
so bringing screen back fails somewhere on HW level?

in console:
  * driver set output=on, hw=on
  * result: output=on and hw=off stay
in X.org:
  * driver set output=on, hw=on
  * result: output=on and hw=on thanks to ? (some delay needed to resurrect
lvds? or trigger additional register?)

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #6 from Alex Deucher <agd5f@yahoo.com> ---
It's the same code in the driver whether the console layer calls it or X calls
it.  Maybe the console also mucks with the backlight?  You can use radeonreg
(http://cgit.freedesktop.org/~airlied/radeontool/) to compare registers.

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

--- Comment #7 from David Heidelberger (okias) <david.heidelberger@ixit.cz> ---
well, as I noticed, there is very dark image on screen, so it's backlight.

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[Bug 70207] rs690: kernel can't bring lvds in dpms on mode

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https://bugs.freedesktop.org/show_bug.cgi?id=70207

Alex Deucher <agd5f@yahoo.com> changed:

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

--- Comment #8 from Alex Deucher <agd5f@yahoo.com> ---


*** This bug has been marked as a duplicate of bug 81382 ***

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