Hi Luis,
well was "drm/amdgpu: defer test IBs on the rings at boot (V3)" does is
delaying the IB test a bit and running it async to the rest of the bootup.
So what most likely happens is that some hardware feature (like power or
clock gating) which doesn't works correctly on your system kicks in and
lets the IB test fail.
It's rather likely that this problem is also responsible for the crashes
you expect later on. So I think we should concentrate on fixing that.
Regards,
Christian.
Am 11.07.2018 um 23:27 schrieb 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 <ji...@amd.com
<mailto:ji...@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...@amd.com
<mailto:jim...@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-boun...@lists.freedesktop.org
<mailto:amd-gfx-boun...@lists.freedesktop.org>> 代表 Luís
Mendes <luis.p.men...@gmail.com <mailto:luis.p.men...@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.men...@gmail.com
<mailto:luis.p.men...@gmail.com><mailto:luis.p.men...@gmail.com
<mailto:luis.p.men...@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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