[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=92974

            Bug ID: 92974
           Summary: Fiji Nano long boot up and long X startup with
                    amdgpu-powerplay enabled
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bug0xa3d2@hushmail.com

Created attachment 119727
  --> https://bugs.freedesktop.org/attachment.cgi?id=119727&action=edit
Output of dmesg after startup.

With AMD Powerplay enabled in the kernel (cloned from
http://cgit.freedesktop.org/~agd5f/linux/?h=amdgpu-powerplay)--when the
computer boots there is text, as usual, before modesetting tries to switch to
the native resolution of the monitor.  At this point, the monitor backlight
turns off for about 5 seconds and then stays on for approximately 2 minutes
displaying nothing as if the computer locked up with no other boot activity
occuring.  The Alt+PrintScreen+E/I/U/R button combo still works at this time. 
If left alone the system finishes booting normally after about 2 minutes. 
dmesg gives these new error/messages: "Failed to send Previous Message." and
..."[drm] ib test on ring 12 succeeded" that I have not noticed when AMD
Powerplay is disabled.

Trying to run, "startx" at the console also simulates a system freeze for about
2 minutes or so then X starts normally.

To work around the long boot and long X startup bug the kernel option, "Device
Drivers/Graphics support/Direct Rendering Manager/Enable legacy fbdev support
for your modesetting driver" must be set with, "n".  This gives a black screen
or no console after the machine boots to log in blind with.  X can also be
started blind and displayed normally with no startup delay.  Another option is
to autologin with KDM or such like to boot directly into X after legacy fbdev
has been disabled in the kernel options.

With AMD Powerplay disabled in the kernel there are no startup issues.

Toggling or including/excluding these kernel boot, "lilo.conf" options have no
effect on the bug: "amdgpu.enable_scheduler=0 ; radeon.modeset=1 ;
radeon.hw_i2c=1 ; radeon.disp_priority=2 ; radeon.fastfb=1 ; radeon.backlight=1
; radeon.pcie_gen2=-1 ; radeon.hard_reset=0"

These patches (applied and not applied) have no effect on the bug:
http://people.freedesktop.org/~agd5f/0001-radeonsi-fix-fiji-raster-config.patch
http://people.freedesktop.org/~agd5f/0001-drm-amdgpu-update-Fiji-s-tiling-mode-table.patch

Hardware: Fury Nano
git:
http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=256ca780500bc445752763f32b246dc9ee396b62

Sidenote: hang check timer is disabled in the kernel.

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https://bugs.freedesktop.org/show_bug.cgi?id=92974

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
(In reply to charlie from comment #0)
> With AMD Powerplay disabled in the kernel there are no startup issues.

Do you mean CONFIG_DRM_AMD_POWERPLAY=n in .config or amdgpu.powerplay=0 on the
kernel command line?


> Toggling or including/excluding these kernel boot, "lilo.conf" options have
> no effect on the bug: "amdgpu.enable_scheduler=0 ; radeon.modeset=1 ;
> radeon.hw_i2c=1 ; radeon.disp_priority=2 ; radeon.fastfb=1 ;
> radeon.backlight=1 ; radeon.pcie_gen2=-1 ; radeon.hard_reset=0"

radeon.* parameters don't have any effect with the amdgpu driver.

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[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=92974

--- Comment #2 from charlie <bug0xa3d2@hushmail.com> ---
Sorry for the delay in response.  My computer was down.

I mean with CONFIG_DRM_AMD_POWERPLAY=n in kernel the ".config" file the
computer starts up normally and X starts normally too without a 2 minute delay
after each.

With CONFIG_DRM_AMD_POWERPLAY=y in the kernel .config file there are two minute
delays at boot and also after type, "startx".

However with CONFIG_DRM_AMD_POWERPLAY=y in kernel this delay/bug can be
bypassed if, "Device Drivers/Graphics support/Direct Rendering Manager/Enable
legacy fbdev support for your modesetting driver" is set to, "n".  I don't know
what ".config" line name is for that option which I set using, "make
menuconfig".  Bypassing the bug this way just causes a blank screen however I
can still login blind and start X to a normal display.  Or I can use KDM or
SDDM to auto-login for me.

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[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=92974

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
What if you enable building the PowerPlay code with CONFIG_DRM_AMD_POWERPLAY=y
but disable it at runtime with amdgpu.powerplay=0 on the kernel command line?
Does the problem occur then or not?

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[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

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--- Comment #4 from charlie <bug0xa3d2@hushmail.com> ---
With these options there is no ~2 minute kernel boot or startx delay bug:

CONFIG_DRM_AMD_POWERPLAY=y in kernel ".config"

"Device Drivers/Graphics support/Direct Rendering Manager/Enable legacy fbdev
support for your modesetting driver" set to, "y" in kernel "make menuconfig".

"amdgpu.powerplay=0" on lilo append line.

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[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

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--- Comment #5 from charlie <bug0xa3d2@hushmail.com> ---
I recently tried out kernel code up to this version:
http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=a7b21a9055f2576df9ff69d52811a047b9399e36

There has been no change--bug remains.

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[Bug 92974] Fiji Nano long boot up and long X startup with amdgpu-powerplay enabled

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--- Comment #6 from charlie <bug0xa3d2@hushmail.com> ---
Created attachment 120362
  --> https://bugs.freedesktop.org/attachment.cgi?id=120362&action=edit
dmesg Friday Dec. 4, 2015

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--- Comment #7 from charlie <bug0xa3d2@hushmail.com> ---
I recently compiled this kernel version:
http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=ab72939ad61cc7c22b03946cac94153a1fa23e43

There was no change in the bug.  I'll submit my kernel ".config" as well.

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--- Comment #8 from charlie <bug0xa3d2@hushmail.com> ---
Created attachment 120363
  --> https://bugs.freedesktop.org/attachment.cgi?id=120363&action=edit
Kernel config Dec. 4, 2015

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--- Comment #9 from charlie <bug0xa3d2@hushmail.com> ---
This commit:

"drm/amdgpu/powerplay/fiji: query supported pcie info from cgs (v2)"

http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=64797db892500bc02f5f15524aca3be97368b7f9

and everything after the above commit has the long boot bug.

______________________

This commit:

"drm/amdgpu/powerplay/tonga: query supported pcie info from cgs (v2)"

http://cgit.freedesktop.org/~agd5f/linux/commit/?h=amdgpu-powerplay&id=211e86eee365c63028c2f25978b964caa9ad622e

does not have the long boot bug on Fiji Nano.

______________________

I did a "git reset --hard HEAD~49" (among others...) from the current git at
"amd/powerplay: don't enable ucode fan control if vbios has no fan table" to
eventually get to a normal boot.

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--- Comment #10 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 120642
  --> https://bugs.freedesktop.org/attachment.cgi?id=120642&action=edit
disable pcie dpm

Does this patch help?

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--- Comment #11 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 120643
  --> https://bugs.freedesktop.org/attachment.cgi?id=120643&action=edit
disable pcie gen3 switching

Please try this patch independent of the previous one.

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--- Comment #12 from charlie <bug0xa3d2@hushmail.com> ---
Both patches ("disable_gen3.diff" and "fiji_disable_pcie_dpm.diff") applied
independently of each other work.  The kernel boots normally and X starts
normally.

These commands were issued before each *.diff was applied and compiled:
"git clean -dxf ; git fetch --all ; git reset --hard origin/amdgpu-powerplay"

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--- Comment #13 from charlie <bug0xa3d2@hushmail.com> ---
I'm now using "drm-next-4.8-wip" (from
https://cgit.freedesktop.org/~agd5f/linux/).  I still require
"fiji_disable_pcie_dpm.diff" to overcome the bug.  I can't remember if
"disable_gen3.diff" no longer patches cleanly or does not work once the kernel
is compiled.  In any case, "disable_gen3.diff" is no longer effective.

Is this a bios issue?  If so, then I can upgrade to the latest bios for my
motherboard to see if the bug persists without patching the kernel.

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--- Comment #14 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to charlie from comment #13)
> I'm now using "drm-next-4.8-wip" (from
> https://cgit.freedesktop.org/~agd5f/linux/).  I still require
> "fiji_disable_pcie_dpm.diff" to overcome the bug.  I can't remember if
> "disable_gen3.diff" no longer patches cleanly or does not work once the
> kernel is compiled.  In any case, "disable_gen3.diff" is no longer effective.
> 
> Is this a bios issue?  If so, then I can upgrade to the latest bios for my
> motherboard to see if the bug persists without patching the kernel.

It could be.  Does a new bios help?  We've seen similar issues with certain
boards internally.  What CPU/motherboard is this?  If your board has options
for configuring the default pcie gen or generic pcie performance options does
changing any of them help?

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--- Comment #15 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to charlie from comment #13)
> I'm now using "drm-next-4.8-wip" (from
> https://cgit.freedesktop.org/~agd5f/linux/).  I still require
> "fiji_disable_pcie_dpm.diff" to overcome the bug.  I can't remember if
> "disable_gen3.diff" no longer patches cleanly or does not work once the
> kernel is compiled.  In any case, "disable_gen3.diff" is no longer effective.
>

On newer kernels you can configure the supported pcie gen modes via module
option.  E.g., append:
amdgpu.pcie_gen_cap=0x00030003
to the kernel command line in grub to limit the bus and the card to pcie gen2.

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--- Comment #16 from charlie <bug0xa3d2@hushmail.com> ---
Motherboard: Asus A88X-PRO
APU: AMD A10-7850K (monitor only receiving R9 Nano output)

I will update the bios and see if there are any "new pcie gen or generic pcie
performance options".

I report back on the use of "amdgpu.pcie_gen_cap=0x00030003" in lilo although 
"PCIe 3.0" is printed on the motherboard.

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--- Comment #17 from charlie <bug0xa3d2@hushmail.com> ---
The bios was updated from 0801 to 2603. The machine booted normally with an
unpatched kernel.  I restored previous overclocking settings and the long boot
bug returned.  Among testing a few bios parameters I found that adjusting "NB
Configuration--PCIEX16_1"--like forcing auto(PCIEX16_2), X16 or X8--has no
effect on the bug.

"APU Frequency" or base clock is the only setting found to effect the long
boot/startx bug.  Any base clock values greater than 100 causes the bug. 
Underclocking CPU, NB and RAM has no effect when base clock is set to 101--the
bug remains.

This behavior did not occur before the commit mentioned earlier in this bug
report thread as the base clock remained the same since before I first
submitted the bug and until my recent testing today.

With "amdgpu.pcie_gen_cap=0x00030003" applied through LILO this machine is
capable of running at 104 base clock stable with system RAM near
2500mhz--without the long boot/startx bug.

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

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

--- Comment #18 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/59.

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