[Bug 98897] Macbook pro 11,5 screen flicker when AC adapter plugged in

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https://bugs.freedesktop.org/show_bug.cgi?id=98897

Martin Peres  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |MOVED

--- Comment #28 from Martin Peres  ---
-- 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/759.

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[Bug 98897] Macbook pro 11,5 screen flicker when AC adapter plugged in

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https://bugs.freedesktop.org/show_bug.cgi?id=98897

--- Comment #27 from extr15  ---
seems if I boot without AC adapter plugged in, then there is no flicker
problem.
plug in AC is OK after I log in my computer.
but when I suspend and wakeup with AC plugged in, the screen flicker will
happen.
any idea?

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[Bug 98897] Macbook pro 11,5 screen flicker when AC adapter plugged in

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--- Comment #26 from extr15  ---
I can now compile a single radeon module, ref:
http://www.codewhirl.com/2012/04/how-to-compile-a-single-module-in-ubuntu-linux/

however, neither attachment 128481 nor attachment 128780 work for me.
the screen still flicker whether plugged in AC adapter or not.
I am macbookpro 11,5, and ubuntu 16.04.
uname -a:
4.8.0-36-generic #36~16.04.1-Ubuntu SMP Sun Feb 5 09:39:57 UTC 2017 x86_64
x86_64 x86_64 GNU/Linux

tail /var/log/Xorg.0.log:

[   877.072] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 52285 < target_msc 52286
[   877.222] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 52294 < target_msc 52295
[   878.838] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 52391 < target_msc 52392

anyone helps? thanks!

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[Bug 98897] Macbook pro 11,5 screen flicker when AC adapter plugged in

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https://bugs.freedesktop.org/show_bug.cgi?id=98897

--- Comment #25 from extr15  ---
(In reply to berg from comment #20)
> Created attachment 128481 [details] [review]
> Setting correct core and memory clock for M370X in MBP 11,5
> 
> No screen flickering after testing out this patch I made on the v4.9 branch.
> I confirmed the GPU configuration on this page
> https://en.wikipedia.org/wiki/AMD_Radeon_Rx_300_series. Set mclk and sclk
> accordingly; assuming that mclk is for memory and sclk is for the GPU clock.
> 
> Noticeably everything is running very nicely. No strange behaviour so far
> and both GPU and CPU temps are OK.
> 
> In addition. My CPU turbo boost is also working, which it previously wasn't
> on 3.8.6. Test at your own risk.

hi berg, thanks for your attachment.
I am new to linux kernel, and I don't how to apply your attachment, i.e. how to
compile a single radeon.ko ?
I find a radeon.ko under
"/lib/modules/4.8.0-36-generic/kernel/drivers/gpu/drm/radeon", so I want to
compile it, likes here: 
https://bugzilla.kernel.org/show_bug.cgi?id=105051#c37

I modify si_dpm.c and write a Makefile:
obj-m += si_dpm.o

all:
  make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
  make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

but when make I get:
/si_dpm.c:24:18: fatal error: drmP.h: No such file or directory
compilation terminated.

so could you tell me how to compile a single .ko or if any tutorial I can
follow, or I have to compile all the kernel?

thanks!

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[Bug 98897] Macbook pro 11,5 screen flicker when AC adapter plugged in

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https://bugs.freedesktop.org/show_bug.cgi?id=98897

--- Comment #24 from Paul Gier  ---
The patch in comment 22 works for me.
Running Fedora 24 with 4.8.16 kernel.  MacBookPro11,5.
Fedora Copr repo available here:
https://copr.fedorainfracloud.org/coprs/pgier/macbook-kernel/

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[Bug 98897] Macbook pro 11,5 screen flicker when AC adapter plugged in

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--- Comment #23 from Tyler Hampton  ---
Running this patch on Linux kernel version 4.9.1 fixes the problem for me.

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--- Comment #22 from Alex Deucher  ---
Created attachment 128780
  --> https://bugs.freedesktop.org/attachment.cgi?id=128780=edit
fix

This patch should fix it.

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--- Comment #21 from berg  ---
I've still not noticed any problems with this patch, I accidentally left the
top two git diff lines in the top of the patch file, this will probably cause
patch command to fail if you don't remove them.

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--- Comment #20 from berg  ---
Created attachment 128481
  --> https://bugs.freedesktop.org/attachment.cgi?id=128481=edit
Setting correct core and memory clock for M370X in MBP 11,5

No screen flickering after testing out this patch I made on the v4.9 branch. I
confirmed the GPU configuration on this page
https://en.wikipedia.org/wiki/AMD_Radeon_Rx_300_series. Set mclk and sclk
accordingly; assuming that mclk is for memory and sclk is for the GPU clock.

Noticeably everything is running very nicely. No strange behaviour so far and
both GPU and CPU temps are OK.

In addition. My CPU turbo boost is also working, which it previously wasn't on
3.8.6. Test at your own risk.

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--- Comment #19 from berg  ---
In hindsight the new code is not as bad as I thought as it is conditional on
the family type and does simplify things. Building 4.9 kernel with a new diff
now.

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--- Comment #18 from berg  ---
(In reply to Cédric Le Goater from comment #17)
> so this is a CHIP_VERDE revision 0x83

(In reply to Cédric Le Goater from comment #14)
> (In reply to Michel Dänzer from comment #10)
> > If you can't or don't want to bisect, there are only 4 radeon driver commits
> > between 4.8.6 and 4.8.7, so it shouldn't take long to try manually reverting
> > each of those.
> > https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/
> > ?h=linux-4.8.y=e136de5d733161fdfd203f23b448434170d189ea seems like a good
> > candidate, since it's clock related and explicitly references your GPU in
> > the code.
> 
> Hi,
> 
> I have reverted this commit on a 4.8.14 and the flickering stopped.
> 
> C.

Having a looking at the diff; the new diff actually configures 


} else if (rdev->family == CHIP_VERDE) {
+   if ((rdev->pdev->revision == 0x81) ||
+   (rdev->pdev->revision == 0x83) ||
...
+   (rdev->pdev->device == 0x6821) ||
...
+   (rdev->pdev->device == 0x682B)) {
+   max_sclk = 75000;
+   max_mclk = 8;
+   }

So on my MacBook Pro 11,5 - the device ID and revision are: 

  01:00.0 0300: 1002:6821 (rev 83)
  01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Venus XT [Radeon HD 8870M / R9 M270X/M370X] (rev 83)

So; since this commit, the max_sclk and max_mclk has been set for this GPU to
75000 and 8. In previous version of this driver module, this specific GPU
was being skipped. I think these values have been incorrectly set for this CPU.

According to these specifications for the M370X Mac chip,
http://gpuboss.com/graphics-card/Radeon-R9-M370X-Mac, the two values max_sclk
and max_mclk are probably:

  Clock speed   775 MHz
  Turbo clock speed 800 MHz

So we are setting this stuff to run possibly 25 MHz out of sync with the actual
GPU clock. I'm guessing this would be subtle enough to cause the flickering
we're seeing, perhaps it should be something like this:

} else if (rdev->family == CHIP_VERDE) {
if (rdev->pdev->device == 0x6821 &&
 rdev->pdev->revision == 0x83) {
max_sclk = 77500;
max_mclk = 8;
} else if other conditions

In general though, the new block of device and revisions are VERY loose and not
very well thought out. The OR conditionals are too far reaching. This GPU is
matched in two different sections and even the device ID or the revision alone
is enough to modify the aforementioned values.

I might make compile 4.9.0 tonight to try this theory out and set max_sclk to
77500. Perhaps the best actual solution is to not even include this device and
revision in the dpm quirks; as it was previously omitted and was never an
actual problem.

I haven't figured out how to determine the actual GPU frequency right now, but
if we can confirm it's running at a stock speed of 775 MHz, that would give me
greater confidence in testing this idea out.

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--- Comment #17 from Cédric Le Goater  ---
so this is a CHIP_VERDE revision 0x83

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--- Comment #16 from Cédric Le Goater  ---

> 
> What chip do you have (pci device id and revision id)?

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus
XT [Radeon HD 8870M / R9 M270X/M370X] (rev 83) (prog-if 00 [VGA controller])
Subsystem: Apple Inc. Radeon R9 M370X Mac Edition
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- 
Kernel driver in use: radeon
Kernel modules: radeon

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--- Comment #15 from Alex Deucher  ---
(In reply to Cédric Le Goater from comment #14)
> Hi,
> 
> I have reverted this commit on a 4.8.14 and the flickering stopped.
> 
> C.

What chip do you have (pci device id and revision id)?

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--- Comment #14 from Cédric Le Goater  ---
(In reply to Michel Dänzer from comment #10)
> If you can't or don't want to bisect, there are only 4 radeon driver commits
> between 4.8.6 and 4.8.7, so it shouldn't take long to try manually reverting
> each of those.
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/
> ?h=linux-4.8.y=e136de5d733161fdfd203f23b448434170d189ea seems like a good
> candidate, since it's clock related and explicitly references your GPU in
> the code.

Hi,

I have reverted this commit on a 4.8.14 and the flickering stopped.

C.

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--- Comment #13 from berg  ---
I can confirm this bug does not affect 4.8.6 kernel on MacBook Pro 11,5.

I built the 4.8.6 kernel this morning and do not have the same flickering
problem as I had 4.8.7 onward. I did notice a very big jump in GPU performance
though from 4.7.0 to 4.8.6 (around 35-40% improvement on OpenGL benchmark) on
the MacBook Pro 11,5 with the radeon driver. 

I did find that the GPU fan was full speed on initial first boot on 4.8.6+,
noticeably very noisy but quietened down after some time.

While I'm not experiencing any flickering on 4.8.6, I have noticed some subtle
screen tearing on Gnome Shell transitions; such as when you hit the super key.
In the past with the fglrx driver, there was an option to enable in the ATI/AMD
configuration manager to address this tearing. I just noticed this tearing as I
was looking for the flickering that this bug mentions.

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--- Comment #12 from Tom B  ---
Apologies for repeated comments. According to
http://www.anandtech.com/show/9276/2015-15inch-retina-macbook-pros-dgpu-r9-m370x-is-cape-verde
(someone else running the same GPU on windows with catalyst driver)

The clock speeds are:

GPU: 800mhz
Memory: 1125mhz

I'm not sure how that correlates to the speeds in the patch you listed:

+   max_sclk = 75000;
+   max_mclk = 8;

What is the difference between sclk and mclk? If mclk is memory clock (as
suggested here:
http://askubuntu.com/questions/569085/radeon-pm-info-what-are-vclk-dclk-sclk-mclk-vddc-and-vddci
) that looks way of but if it's GPU clock then 8 (assuming 8 means
800mhz) is correct but then I don't know what the memory clock is or how to
work it out. 

radon_pm_info does show seemingly correct information  that tallies with the
patch above

uvdvclk: 0 dclk: 0
power level 0sclk: 3 mclk: 3 vddc: 900 vddci: 850 pcie gen: 3


It shows the same in both battery and performance mode and seems to be working
correctly. In performance mode if I run a GPU intensive program such as
inigine-heaven the power level, as expected, changes:

uvdvclk: 0 dclk: 0
power level 4sclk: 75000 mclk: 8 vddc: 1025 vddci: 900 pcie gen: 3


Interestingly, when the GPU is running at power level 4, there's no flicker! So
it seems to be an issue with power level 0. Despite the clocks showing the same
on both "battery" and "performance" mode at power level 0, the flicker (and
additional heat) only happen on "performance" mode. So the flicker is some
combination of "performance" dpm state and power level 0 even though the clock
speeds seem the same.

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--- Comment #11 from Tom B  ---
I've never done that before so give me some time and I'll try it. Is there any
command I can run to work out what my rdev->pdev->revision is?

I'm also struggling to find any official information on clock speeds for the
m370x, I'll keep looking hopefully it's on the amd site somewhere!

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--- Comment #10 from Michel Dänzer  ---
If you can't or don't want to bisect, there are only 4 radeon driver commits
between 4.8.6 and 4.8.7, so it shouldn't take long to try manually reverting
each of those.
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.8.y=e136de5d733161fdfd203f23b448434170d189ea
seems like a good candidate, since it's clock related and explicitly references
your GPU in the code.

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--- Comment #9 from Tom B  ---
I did a bit more digging to see what the connection is with the power cable and
it seems unrelated. 

The flicker happens only when the power cable is connected AND the power mode
is performance (or balanced***see bottom of post***).

But, power_dpm_state seems to be ignored unless the power cable is plugged in.
To test this I ran unigine-heaven with default settings

power cable + battery dpm state = 4fps

power cable + performance dpm state = 8fps

no power cable  + battery dpm state = 4fps

no power cable  + performance dpm state = 4fps

So obviously the last result tells us that having the power cable unplugged
forces "battery" mode regardless of whether "performance" is set in
power_dpm_state and the power cable itself is a bit of a red herring, it's the
performance dpm state which causes the flicker and having the power cable
connected is the only way to get the gpu into performance mode.

(These numbers seem rather low for a M370X GPU since it apparently gets 35 in
windows, see
http://www.mobiletechreview.com/notebooks/15-inch-Retina-MacBook-Pro-2015.htm
I'm not sure how the radeon driver stacks up and I'm not really bothered about
that as I don't any gpu intensive work, but the performance may highlight clock
speed issues)




* Note on "balanced". Since "balanced" always seems to cause the flicker
and high temperatures when enabled, it suggests that it's being rather
over-zealous with its clock speeds. Forcing "battery" has no noticeable impact
on performance  in desktop applications. I'm not sure how it's measured but
"balanced" would probably be better with a different threshold.

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--- Comment #8 from Tom B  ---
The issue began at version 4.8.7 also mentioned here:
https://aur.archlinux.org/packages/linux-macbook/

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Michel Dänzer  changed:

   What|Removed |Added

 Attachment #128267|text/x-log  |text/plain
  mime type||

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--- Comment #7 from Michel Dänzer  ---
Can you bisect, or at least narrow down the kernel version which introduced the
issue?

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--- Comment #5 from Tom B  ---
Created attachment 128267
  --> https://bugs.freedesktop.org/attachment.cgi?id=128267=edit
Xorg log

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--- Comment #4 from Tom B  ---
Created attachment 128266
  --> https://bugs.freedesktop.org/attachment.cgi?id=128266=edit
dmesg output

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--- Comment #3 from Alex Deucher  ---
Is this system a hybrid laptop with 2 GPUs (integrated and discrete)?

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--- Comment #2 from Alex Deucher  ---
Please attach your dmesg output and xorg log.

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--- Comment #1 from Tom B  ---
Update: After suspending the machine overnight and booting it this morning, the
`battery` setting is still active and upon resume seems to have had an effect
on temperature. I'm now seeing 42C on radeon-pci-0100 after 20 minutes on the
desktop which is far more sane previously the temperature was always around
60C, although  radeon_pm_info reports the same numbers

The suspend/resume cycle seems to have forced the `battery` setting fixing both
temperatures and the flicker issue. Could the flicker issue be due to
overheating/overclocking? I've seen similar graphical artifacts/corruption in
games when overclocking GPUs too high.

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Michel Dänzer  changed:

   What|Removed |Added

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

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