[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

            Bug ID: 99261
           Summary: Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot
                    hangs on switch to amdgpudrmfb
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: nmset@netcourrier.com

Created attachment 128729
  --> https://bugs.freedesktop.org/attachment.cgi?id=128729&action=edit
kernel log on boot failure

Since testing kernel 4.10 preRC, RC1 and RC2, my laptop hangs on boot at line 
fb : switch to amdgpudrmfb from EVI VGA.

A few specs :

APU : AMD A10-7300 Radeon R6, 10 Compute Cores 4C+6G (from /proc/cpuinfo).
iGPU : 00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Kaveri
HDMI/DP Audio Controller
dGPU : 01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Topaz
XT [Radeon R7 M260/M265 / M340/M360 / M440/M445]
Xorg : 1.18.4, on Arch Linux
Boot command line : BOOT_IMAGE=/boot/vmlinuz-linux
root=UUID=76ba28b4-683c-4a39-96ef-6a1105905567 rw acpi=off (I have to use
acpi=off on 4.10-rcX to go beyonf initramfs loading)

Whatever amdgpu module's option combination I use is of no avail. These ones
(aspm=0 bapm=0 runpm=0 powerplay=1) allow me to use amdgpu on 4.9.

Attached is a kernel.log file where there is a stack trace of amdgpu module
crashing.

I can use 4.10-rc2 on my desktop with RX480 and an old Phenom II x6 CPU.

I am posting here in the hope of getting developer attention to care about this
module's crashing, on KMS seemingly. If I use nomodeset, the module gets
loaded, but obviously, there's no X session beyond.

Regards.

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[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #128729|text/x-log                  |text/plain
          mime type|                            |

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[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
The driver is not able to find the vbios:
Jan  3 16:28:52 hp2 kernel: [   10.626851] [drm:amdgpu_get_bios [amdgpu]]
*ERROR* Unable to locate a BIOS ROM

Possibly the related to this:
https://bugzilla.kernel.org/show_bug.cgi?id=141741

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[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

--- Comment #2 from SET <nmset@netcourrier.com> ---
I tried to bisect for the first time, here's what I did :

git bisect start
git bisect bad
git bisect good v4.9
Bisecting: 5782 revisions left to test after this (roughly 13 steps)
[72cca7baf4fba777b8ab770b902cf2e08941773f] Merge tag 'staging-4.10-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

... compile ... The resulting kernel loads amdgpu with a usable X.

git bisect good     
Bisecting: 2865 revisions left to test after this (roughly 12 steps)
[775fadd09e7beac2fc61cc0517629e9fa69bdb56] Merge tag 'armsoc-defconfig' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Now I don't know what else to do !

This patch seems to indicate locating vbios is being reworked, something is
probably left out.
https://lists.freedesktop.org/archives/amd-gfx/2016-December/004179.html

Thx.

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[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to SET from comment #2)
> I tried to bisect for the first time, here's what I did :
> 
> git bisect start
> git bisect bad
> git bisect good v4.9
> Bisecting: 5782 revisions left to test after this (roughly 13 steps)
> [72cca7baf4fba777b8ab770b902cf2e08941773f] Merge tag 'staging-4.10-rc1' of
> git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
> 
> ... compile ... The resulting kernel loads amdgpu with a usable X.
> 
> git bisect good     
> Bisecting: 2865 revisions left to test after this (roughly 12 steps)
> [775fadd09e7beac2fc61cc0517629e9fa69bdb56] Merge tag 'armsoc-defconfig' of
> git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
> 
> Now I don't know what else to do !

if things work:
git bisect good
of things don't work:
git bisect bad
and continue until it's done.

> 
> This patch seems to indicate locating vbios is being reworked, something is
> probably left out.
> https://lists.freedesktop.org/archives/amd-gfx/2016-December/004179.html

That code is not upstream yet.  We haven't really touched the vbios fetching
code in a long time, so if you are seeing a regression, it's probably somewhere
else.

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[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

--- Comment #4 from SET <nmset@netcourrier.com> ---
Well, the hang up on switch to amdgpudrmfb was due to the kernel boot parameter
'acpi=off' I had to use to go beyond the 'loading initramfs' step. Initial
hangup in the latter step was due to a UEFI bug of the laptop.

Fortunately, the manufacturer provides a BIOS update with the tag 'UEFI
security enhancement'. After flashing the new BIOS, the laptop boots with
kernel 4.10-rc2, with a few errors related to amdgpu, which I'll report in a
new post.

Sorry for the inconvenience.

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[Bug 99261] Kernel 4.10-rc2 on APU with Kaveri + Topaz : boot hangs on switch to amdgpudrmfb

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https://bugs.freedesktop.org/show_bug.cgi?id=99261

Alex Deucher <alexdeucher@gmail.com> changed:

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

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