[Bug 60857] New: Unstable display with Radeon 760G (ASUS M4A78L-M LE)

[Bug 60857] New: Unstable display with Radeon 760G (ASUS M4A78L-M LE)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=60857

            Bug ID: 60857
           Summary: Unstable display with Radeon 760G (ASUS M4A78L-M LE)
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.11
          Hardware: i386
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: smf.linux@ntlworld.com
        Regression: No

Created attachment 107428
  --> https://bugzilla.kernel.org/attachment.cgi?id=107428&action=edit
Screen image, dmesg ,lspci and kernel config

I have just upgraded this machine from kernel 3.8.13 to 3.11 and I have
discovered that the VGA output has become unstable (see attached). The dmesg
output shows a number of issues/warnings which may be associated with the
problem but that may just be speculation on my part. 

Please advise.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=60857

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 107430
  --> https://bugzilla.kernel.org/attachment.cgi?id=107430&action=edit
possible fix

Does the attached patch fix the issue?

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #2 from Stuart Foster <smf.linux@ntlworld.com> ---
(In reply to Alex Deucher from comment #1)
> Created attachment 107430 [details]
> possible fix
> 
> Does the attached patch fix the issue?

Sorry Alex the patch made no difference.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
Can you bisect?  Also just to be sure, the monitor in qestion is connected to
the integrated chip, not the dGPU correct?  Does disabling dpm fix the issue?

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #4 from Stuart Foster <smf.linux@ntlworld.com> ---
(In reply to Alex Deucher from comment #3)
> Can you bisect?  Also just to be sure, the monitor in qestion is connected
> to the integrated chip, not the dGPU correct?  Does disabling dpm fix the
> issue?

The monitor is connected to the integrated chip on the motherboard (760G
[Radeon 3000]) Disabling dpm does fix the problem (radeon.dpm=0 on lilo append
line, the patch is still included).

dmesg now reports:

 [drm] radeon: power management initialized

as apposed to

 [drm] radeon: dpm initialized

There is no mention of any power mangement on the RV516 [Radeon X1300/X1550
Series] is that correct ?

The problem is present in vanilla 3.11-rc1.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Stuart Foster from comment #4)
> (In reply to Alex Deucher from comment #3)
> > Can you bisect?  Also just to be sure, the monitor in qestion is connected
> > to the integrated chip, not the dGPU correct?  Does disabling dpm fix the
> > issue?
> 
> The monitor is connected to the integrated chip on the motherboard (760G
> [Radeon 3000]) Disabling dpm does fix the problem (radeon.dpm=0 on lilo
> append line, the patch is still included).

So disabling pdm fixes the issue?  It would be nice to know if it's also fixed
with dpm disabled and without the patch.

> 
> dmesg now reports:
> 
>  [drm] radeon: power management initialized
>  
> as apposed to
> 
>  [drm] radeon: dpm initialized
> 
> There is no mention of any power mangement on the RV516 [Radeon X1300/X1550
> Series] is that correct ?

Correct.  dpm is only supported on r6xx and newer asics.

> 
> The problem is present in vanilla 3.11-rc1.

You mean 3.12-rc1?

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #6 from Stuart Foster <smf.linux@ntlworld.com> ---
(In reply to Alex Deucher from comment #5)
> (In reply to Stuart Foster from comment #4)
> > (In reply to Alex Deucher from comment #3)
> > > Can you bisect?  Also just to be sure, the monitor in qestion is connected
> > > to the integrated chip, not the dGPU correct?  Does disabling dpm fix the
> > > issue?
> > 
> > The monitor is connected to the integrated chip on the motherboard (760G
> > [Radeon 3000]) Disabling dpm does fix the problem (radeon.dpm=0 on lilo
> > append line, the patch is still included).
> 
> So disabling pdm fixes the issue?  It would be nice to know if it's also
> fixed with dpm disabled and without the patch.
> 
> > 
> > dmesg now reports:
> > 
> >  [drm] radeon: power management initialized
> >  
> > as apposed to
> > 
> >  [drm] radeon: dpm initialized
> > 
> > There is no mention of any power mangement on the RV516 [Radeon X1300/X1550
> > Series] is that correct ?
> 
> Correct.  dpm is only supported on r6xx and newer asics.
> 
> > 
> > The problem is present in vanilla 3.11-rc1.
> 
> You mean 3.12-rc1?

No having found that turning dpm off fixed the problem I went back to the first
3.11-rc which introduced the radeon dpm code.

The problem is fixed with the patch removed and with dpm turn off.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #107430|0                           |1
        is obsolete|                            |

--- Comment #7 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 108131
  --> https://bugzilla.kernel.org/attachment.cgi?id=108131&action=edit
debugging output

Can you attach your dmesg output with this patch applied?

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #8 from Stuart Foster <smf.linux@ntlworld.com> ---
Created attachment 108311
  --> https://bugzilla.kernel.org/attachment.cgi?id=108311&action=edit
Dmesg output

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #9 from Stuart Foster <smf.linux@ntlworld.com> ---
The dmesg is from a vanilla 3.11 kernel with dpm turned on and patch
kbug60857.diff applied.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #10 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 108321
  --> https://bugzilla.kernel.org/attachment.cgi?id=108321&action=edit
skip_set_power_state

Here are two patches to test.  Test them independently and let me know if
either one helps.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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https://bugzilla.kernel.org/show_bug.cgi?id=60857

--- Comment #11 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 108331
  --> https://bugzilla.kernel.org/attachment.cgi?id=108331&action=edit
skip_clock_scaling

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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--- Comment #12 from Stuart Foster <smf.linux@ntlworld.com> ---
(In reply to Alex Deucher from comment #11)
> Created attachment 108331 [details]
> skip_clock_scaling

Both patches appear to work ok.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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--- Comment #13 from Alex Deucher <alexdeucher@gmail.com> ---
Great.  I'll push the skip_clock_scaling patch upstream.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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--- Comment #14 from Stuart Foster <smf.linux@ntlworld.com> ---
(In reply to Alex Deucher from comment #13)
> Great.  I'll push the skip_clock_scaling patch upstream.

Ok thank you.

Stuart

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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--- Comment #15 from Stuart Foster <smf.linux@ntlworld.com> ---
Created attachment 108661
  --> https://bugzilla.kernel.org/attachment.cgi?id=108661&action=edit
Output from dmesg from vanilla kernel 3.12-rc1

Alex

With the release of kernel 3.12-rc1 I took the opportunity look at the display
stability of the kernel with non of the patches we discussed applied and I was
surprised to see that the display was unexpectedly stable. However I am
wondering if dpm is actually active for some reason and masking my original
issue. The following extracts from the attached dmesg log are what give me
grounds for concern:

Kernel command line: BOOT_IMAGE=Trial ro root=813 nf_conntrack.acct=1
userpte=nohigh radeon.modeset=1 radeon.agpmode=-1 radeon.audio=1 iommu=pt
iommu=1 radeon.dpm=1
Booting kernel: `-1' invalid for parameter `radeon.agpmode'

[drm] radeon: power management initialized

what do you think ?

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--- Comment #16 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Stuart Foster from comment #15)
> [drm] radeon: power management initialized
> 
> what do you think ?

dpm is not enabled.  You should see:

 [drm] radeon: dpm initialized

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--- Comment #17 from Stuart Foster <smf.linux@ntlworld.com> ---
removing the radeon.agpmode=-1 from the command line enabled the radeon dpm to
be initialized.

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[Bug 60857] Unstable display with Radeon 760G (ASUS M4A78L-M LE)

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mirh (mirh@protonmail.ch) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mirh@protonmail.ch

--- Comment #18 from mirh (mirh@protonmail.ch) ---
Github says e40210cca98068835acd5a4fe760bf96b3a1aa48 landed in 3.12-rc2. 
Is this fixed now?

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