Re: 答复: Regression with kernel 4.18 - AMD RX 550 fails IB ring test on power-up

[Luís Mendes]

Hi Jim,

I followed your suggestion and was able to bisect the kernel patches.
The offending patch is: drm/amdgpu: defer test IBs on the rings at boot (V3)
commit:

2c773de2ecb8c327f2448bd1eecad224e9227087
<https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.18-rc4&id=2c773de2ecb8c327f2448bd1eecad224e9227087>

After reverting this patch the IB test succeeded with kernel v4.18-rc4 on
both systems and the amdgpu driver was correctly loaded both on SAPPHIRE
RX550 4GB and on SAPPHIRE RX460 2GB.

The GPU hang remains, however.
 I will try to configure a remote IPMI connection to see what is happening
with the kernel boot or setup a serial console for the Kernel.

Thanks & Regards,
Luís

On Wed, Jul 11, 2018 at 10:56 AM, jimqu <jimqu at amd.com> wrote:

> HI Luis,
>
>
> Let us trace the issue one by one.
>
>
> IB test fail:
>
> This should be regression issue on 4.18, you can bisect the kernel patches.
>
> GPU hang:
>
> Fix IB test fail first.
>
>
> Thanks
>
> JimQu
>
>
>
> On 2018年07月11日 17:34, Luís Mendes wrote:
>
> Hi Jim,
>
> Thanks for your interest in this issue. Actually this is a multiple
> issue... not only the IB ring test is failing... as I am having quite some
> trouble getting the cards SAPPHIRE RX 550 4GB on a Tyan S7025 and SAPPHIRE
> RX 460 2GB on a TYAN S7002 to work, both systems using same Ubuntu 18.04
> with vanilla kernel.
>
> *1. May you also test earlier kernel? v4.17 or v4.16.*
> I've tested kernels v4.17.5 and v4.16.6 with same system and both are able
> to pass the IB ring test and system boots into X using NVIDIA as the
> display connected card.
> dmesg log attached for kernel 4.17.5, file TYAN_S7025_kernelv4.17.5_
> amdgpu_IB_ring_test_OK.txt.
>
> *2. May you test the issue only with amdgpu?*
> - I've tested on a TYAN S7002 system with a single SAPPHIRE RX 460 2GB,
> on-board VGA enabled and used as primary display.
> Kernel v4.18-rc4 fails the IB ring test, system is able to enter X through
> the on-board VGA.
> dmesg log attached for kernel 4.18-rc4, file TYAN_S7002_kernel_v4.18-rc4_
> IB_ring_test_fail.txt.
>
> - Same TYAN S7002 system, but now with on-board VGA disabled and using RX
> 460 as display connected card.
> Kernels v4.17.5 and v4.16.6 are able to pass the IB ring test, but GPU
> hangs before entering X. Don't have logs for these yet.
>
> Regards,
> Luís Mendes
> Aparapi contributor and MSc Researcher
>
>
>
>
>
> On Wed, Jul 11, 2018 at 3:49 AM, Qu, Jim <Jim.Qu at amd.com> wrote:
>
>> Hi Luis,
>>
>> 1. May you also test earlier kernel? v4.17 or v4.16.
>> 2. May you test the issue only with amdgpu?
>>
>> Thanks
>> JimQu
>>
>> ________________________________________
>> 发件人: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> 代表 Luís Mendes <
>> luis.p.mendes at gmail.com>
>> 发送时间: 2018年7月11日 6:04:00
>> 收件人: Michel Dänzer; Koenig, Christian; amd-gfx list
>> 主题: Re: Regression with kernel 4.18 - AMD RX 550 fails IB ring test on
>> power-up
>>
>> Hi,
>>
>> Issue remains in kernel 4.18-rc4 using SAPPHIRE RX 550 4GB.
>>
>> Logs follow attached.
>>
>> Regards,
>> Luis
>>
>> On Tue, Jun 26, 2018 at 10:08 AM, Luís Mendes <luis.p.mendes at gmail.com
>> <mailto:luis.p.mendes at gmail.com>> wrote:
>> Hi,
>>
>> I've tried kernel 4.18-rc2 on a system with a NVIDIA GTX 1050 Ti and an
>> AMD RX 550 4GB and the RX 550 card is failing the IB ring test.
>>
>> [    5.033217] [drm:gfx_v8_0_ring_test_ib [amdgpu]] *ERROR* amdgpu: ib
>> test failed (scratch(0xC040)=0xFFFFFFFF)
>> [    5.033264] [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* amdgpu: failed
>> testing IB on ring 6 (-22).
>>
>> Please see the attached log.
>>
>> Regards,
>> Luís
>>
>>
>
>
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