GPU hang trying to run OpenCL kernels on x86_64

[Luís Mendes]

Hi Michel,

I also work as a researcher at a university and we are considering buying
AMD cards to do OpenCL computations for numerical modelling, but currently
I am unable to give a try at the AMD cards I have at home.
I couldn't find any working driver for them... also amdgpu-pro drivers
don't work, or at least I have been unable to make them work.

Regards,
Luís

On Thu, May 24, 2018 at 10:01 AM, Luís Mendes <luis.p.mendes at gmail.com>
wrote:

> Hi Michel,
>
> So summarizing with Linux kernel 4.17-rc6 on Ubuntu 18.04 using AMD RX
> 460/RX 550 I am not able to enter X.
> The same system with AMD Radeon R7 240 not only enters X as also runs the
> OpenCL kernel that RX 460 / RX 550 are unable to run for all the kernels
> that I have tested.
> Could this also be a Mesa issue, regarding OpenCL on RX 460?
>
> Regards,
> Luís
>
> On Thu, May 24, 2018 at 9:55 AM, Luís Mendes <luis.p.mendes at gmail.com>
> wrote:
>
>> Hi Michel,
>>
>> I will have to check previous rc releases of 4.17 to see if it wasn't
>> already happening, before trying any possible git bisect.
>> As an update I can say that an AMD Radeon R7 240 works fine on the same
>> system with the same kernel and I am able to run the OpenCL kernels, that I
>> couldn't with RX 460/RX 550.
>>
>> Regards,
>> Luís
>>
>> On Thu, May 24, 2018 at 9:30 AM, Michel Dänzer <michel at daenzer.net>
>> wrote:
>>
>>> On 2018-05-24 12:06 AM, Luís Mendes wrote:
>>> > I've tried Linux 4.17-rc6 with Ubuntu 18.04 on Tyan S7002 and I am not
>>> even
>>> > able see lightdm/gdm3 as system hangs when starting X.
>>> > Having SR-IOV enabled or disabled makes no difference.
>>> > Tested with AMD RX 460.
>>> > When X is supposed to start the system hangs and only a rectangular
>>> region
>>> > on the top left corner screen remains with console text messages from
>>> the
>>> > boot process while the remaining of the screen is just black. I am
>>> unable
>>> > to do anything with the keyboard, switching to console does not work,
>>> > ctrl-alt-del also doesn't work. I've to do a cold reset.
>>>
>>> Can you isolate which change introduced this new issue with git bisect?
>>>
>>>
>>> --
>>> Earthling Michel Dänzer               |               http://www.amd.com
>>> Libre software enthusiast             |             Mesa and X developer
>>>
>>
>>
>
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