[Bug 92891] New: Maschine hangs forever at loading the radeon module

[Bug 92891] New: Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

            Bug ID: 92891
           Summary: Maschine hangs forever at loading the radeon module
           Product: Drivers
           Version: 2.5
    Kernel Version: v3.14.31-rt28 /
                    e1a0d6d8b023c54a5677310e68222e7a58b11f91 /
                    linux-stable-rt
          Hardware: All
                OS: Linux
              Tree: PREEMPT_RT
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: georg@schorsch-tech.de
        Regression: No

Created attachment 166041
  --> https://bugzilla.kernel.org/attachment.cgi?id=166041&action=edit
Kernel config

Hi all,

recently i changed my Gfx card from a evergreen/hd5770 to a pitcairn/r290
(Chipset: "PITCAIRN" (ChipID = 0x6811)).
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Curacao PRO [Radeon R9 270] [1002:6811]

On a second partition a realtime system without any problems. The system ran
for a year with the kernel 3.10.20-rt17 perfect fine. 

Now as i updated my hardware with the new gfx card i started the RT system, i
assumed the problem is the gfx card driver. I updated the kernel to the latest
in 
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git . The
first try was v3.14.31-rt28. But it froze like the old (v3.10.20-rt17) kernel.
After some testing i found out that the old (3.10) and the new (3.14) kernel
start the machine when i disable KMS (radeon.modeset = 0). 

The exact point in the startup procedure is "Waiting for uevents". At this
stage udev get started and loads the modules. 

After testing various kernel versions i picked 3.14.31-rt28 this did start the
machine without the commandline "radeon.modeset=0" and i thought i have a
working commit, but X did not start and i tried to load the module manually. At
this point (modprobe radeon) the machine froze again.

I attached the old evergreen card in the machine and tested with this card what
configuration runs. I got the following results:

Evergreen:
v3.10.20-rt17    Ok
v3.14.20-rt17    Not Ok (freeze)

Pitcairn:
v3.10.20-rt17    Not Ok (freeze)
v3.14.20-rt17    Not Ok (freeze)


So i just filled this bugreport against the newest version i tried.

What info should i add?

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #1 from georg@schorsch-tech.de ---
Created attachment 166051
  --> https://bugzilla.kernel.org/attachment.cgi?id=166051&action=edit
config 3.10.20-rt17 which did run for a year with evergreen card

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #2 from georg@schorsch-tech.de ---
Sorry: Correction
After testing various kernel versions i picked 3.8.13.14-rt31 this did start
the machine without the commandline "radeon.modeset=0" and i thought i have a
working commit, but X did not start and i tried to load the module manually. At
this point (modprobe radeon) the machine froze again.

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

Alex Deucher <alexdeucher@gmail.com> changed:

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

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
Can you bisect?

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #4 from georg@schorsch-tech.de ---
Hello Alex,

this is my bisect result:
git bisect bad
01ac8794a77192236a4b91c33adf4177ac5a21f0 is the first bad commit
commit 01ac8794a77192236a4b91c33adf4177ac5a21f0
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Wed Dec 18 19:11:27 2013 -0500

    drm/radeon: re-order firmware loading in preparation for dpm rework

    We need to reorder the driver init sequence to better accomodate
    dpm which needs to be loaded earlier in the init sequence.  Move
    fw init up so that it's available for dpm init.

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 eba931a20e6dbe63d4b24e7e0fce83a8ac24d327
4e0bc09de082e88d43615b492b3a9433f99148f5 M    drivers

I added my bisect log.

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #5 from georg@schorsch-tech.de ---
Created attachment 166201
  --> https://bugzilla.kernel.org/attachment.cgi?id=166201&action=edit
bisect log

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #6 from georg@schorsch-tech.de ---
I know this is a commit not on the RT Tree. I have done this bisecting with the
evergreen card.

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Juniper XT [Radeon HD 5770] [1002:68b8]

As config i always used the 3.14.20-rt17 config for oldconfig source.

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #7 from georg@schorsch-tech.de ---
Created attachment 166211
  --> https://bugzilla.kernel.org/attachment.cgi?id=166211&action=edit
the config used as the bisect ended

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #8 from georg@schorsch-tech.de ---
After the current bisect result did not satisfy me, i tried various other RT
kernels prior the 3.13 result from the bisect with the evergreen card.

Between 3.12.15-rt25 and 3.10.20-rt17 i have no rt tags in my tree. I know
that both cards run with 3.18.5 (non rt). 

So i tried a manual search in the tree, i tried "non-rt" and "rt" versions out
of my tree with the evergreen card.

3.12.37-rt51 : bad
3.12.15-rt25 : bad
3.10.20-rt17 : good
3.10.67-rt71 : good

3.11.0 : good
3.12.0 : good
3.12.15: bad
3.13.0 : good

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #9 from georg@schorsch-tech.de ---
Now plug the PITCAIRN card into the pc again. I tried the saved kernels from
avouve. There i discouvered, that the machine is not hanging itself, it is just
the display which hangs. The display connected to the DVI-0 and DVI-1 port dont
update anymore. I could ssh into the machine. Even the RT kernels did
respond.... 

The results with the PITCAIRN card:
3.12.37-rt51 : No image
3.12.15-rt25 : No image
3.10.20-rt17 : No image
3.10.67-rt71 : No image

3.11.0 : No image
3.12.0 : No image
3.12.15: No image
3.13.0 : No image

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #10 from Alex Deucher <alexdeucher@gmail.com> ---
Does disabling dpm help?  Append radeon.dpm=0 to the kernel command line in
grub.

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #11 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your dmesg output and a copy of your vbios.  To get a copy of
your vbios:
(as root)
(use lspci to get the bus id)
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #12 from georg@schorsch-tech.de ---
Created attachment 166481
  --> https://bugzilla.kernel.org/attachment.cgi?id=166481&action=edit
vbios PITCAIRN

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #13 from georg@schorsch-tech.de ---
With radeon.dpm=0 the 3.10.67 kernel did boot up and showed me on the PITCAIRN
card the display and let me work on it.

What kernel/card combination dmesg log should i post?

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #14 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to georg from comment #13)
> With radeon.dpm=0 the 3.10.67 kernel did boot up and showed me on the
> PITCAIRN card the display and let me work on it.
> 
> What kernel/card combination dmesg log should i post?

It doesn't matter.  I just want to see the basic output from the driver.

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #15 from georg@schorsch-tech.de ---
Created attachment 166491
  --> https://bugzilla.kernel.org/attachment.cgi?id=166491&action=edit
dmesg of current 3.18.5 (non rt)

This is from the curren working 3.18.5 (non-rt) kernel.

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #16 from georg@schorsch-tech.de ---
Created attachment 166501
  --> https://bugzilla.kernel.org/attachment.cgi?id=166501&action=edit
dmesg when display doesnt update anymore

And this is the dmesg when the display doesnt update anymore without
radeon.dpm=0

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[Bug 92891] Maschine hangs forever at loading the radeon module

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=92891

--- Comment #17 from georg@schorsch-tech.de ---
Oh my god! I just saw it!
[   17.080350] si_cp: Failed to load firmware "radeon/PITCAIRN_pfp.bin"

After i copied from my other partition the radeon firmware to /lib/firmware,
the display is now ok....

I wonder why the 3.14 kernel did not install the firmware ....

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