[Bug 92982] slow switching to KD_GRAPHICS (KMS?)

[Bug 92982] slow switching to KD_GRAPHICS (KMS?)

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https://bugs.freedesktop.org/show_bug.cgi?id=92982

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Driver/Radeon               |DRM/Radeon
           Assignee|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop
                   |                            |.org
            Product|xorg                        |DRI
         QA Contact|xorg-team@lists.x.org       |

--- Comment #10 from Michel Dänzer <michel@daenzer.net> ---
(In reply to royvandervegt from comment #7)
> Do I have to compile my own kernel with added printfs?

I'm afraid so.

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[Bug 92982] slow switching to KD_GRAPHICS (KMS?)

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https://bugs.freedesktop.org/show_bug.cgi?id=92982

--- Comment #11 from royvandervegt@gmail.com ---
It turns out the problems are caused by DPM. Without DPM (using radeon.dpm=0)
everything works as it should.

I have tried tweaking the DPM parameters using
https://wiki.archlinux.org/index.php/ATI#Dynamic_power_management, but changing
dpm_state to `performance` and power_dpm_force_performance_level to `high`
doesn't solve the issues (in fact, changing these parameters seems to have no
effect at all?).

Obviously disabling DPM isn't ideal, so it would be nice if there was a
workaround/fix.

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[Bug 92982] slow switching to KD_GRAPHICS (KMS?)

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https://bugs.freedesktop.org/show_bug.cgi?id=92982

--- Comment #12 from royvandervegt@gmail.com ---
Interestingly enough, it seems to have little to do with the clock speeds. 

With dpm turned on and radeon_dpm_force_performance_level set to high (doesn't
switch properly):

uvd    vclk: 0 dclk: 0
power level 2    sclk: 75000 mclk: 80000 vddc: 1120 vddci: 0

With radeon.dpm=0 (WORKS, switches quickly):
default engine clock: 750000 kHz
current engine clock: 749980 kHz
default memory clock: 800000 kHz
current memory clock: 799870 kHz
voltage: 1120 mV
PCIE lanes: 16

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[Bug 92982] slow switching to KD_GRAPHICS (KMS?)

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https://bugs.freedesktop.org/show_bug.cgi?id=92982

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

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

--- Comment #13 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/661.

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