Strange issue on Vega 8 Mobile (HP Envy x360 Laptop)

[Min Xu]

Thanks for explaining that firmware is not permanently loaded. Then, I have
no ideas. Do you need my dmesg output?

On Mon, Jan 29, 2018 at 12:02 PM, Min Xu <min.xu.public at gmail.com> wrote:

> I am running archlinux, the firmware version is very new:
>
> linux-firmware-20180119.2a713be-1
>
>
> On Mon, Jan 29, 2018 at 12:01 PM, Bridgman, John <John.Bridgman at amd.com>
> wrote:
>
>> Microcode for the GPU hardware blocks is not permanently updated in the
>> chip, but rather is loaded at power-up. Usually the files will be
>> distributed via a package with a name like linux-firmware.
>>
>>
>>
>> I didn't see a mention of which distro/version you are using but along
>> with new kernel you will need a relatively new version of linux-firmware.
>>
>>
>>
>> *From:* amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] *On
>> Behalf Of *Min Xu
>> *Sent:* Monday, January 29, 2018 2:57 PM
>> *To:* amd-gfx at lists.freedesktop.org
>> *Subject:* Strange issue on Vega 8 Mobile (HP Envy x360 Laptop)
>>
>>
>>
>> Dear AMD GFX developers,
>>
>>
>>
>> I just got a HP Envy x360 laptop and I am trying to run linux on it. I
>> want to first thank you all for the great work on the amdgpu driver.
>> Without it, people like me wants to run Linux would be stuck with windows.
>>
>>
>>
>> I suspect that my issue is a new issue that hasn't been reported before,
>> therefore, I am writing to you to see if there indeed is a new issue and
>> whether there is a workaround.
>>
>>
>>
>> I have compiled the latest kernel from the amd-staging-drm-next branch
>> last night. I think the kernel "works" with my GPU. The previous two
>> kernels I tried (4.14 and 4.15 final release) either doesn't support this
>> card or just simply hang the system most of the time.
>>
>>
>>
>> The issue I have is that the graphic card seems to never switch to the
>> high resolution mode of the monitor. The kernel would boot with the default
>> 800x600 VGA graphics and then stuck. The monitor continuous to display the
>> content written to the 800x600 console (some kernel booting messages) after
>> amdgpu takes over. I can see from kernel dmesg the amdgpu driver found my
>> card and initialized it and seems to be all happy about it. Yet, nothing
>> new is displayed on the monitor. The monitor just stuck at the content of
>> the 800x600 graphics.
>>
>>
>>
>> The keyboard works in this situation. Kernel is alive and I can reboot it
>> by pressing <ctrl>+<alt>+<del> and I saw from the log file the system
>> restarts just fine.
>>
>>
>>
>> I have tried different noobs of the amdgpu driver, like
>> amdgpu.exp_hw_support=1, si_support=0, etc. Nothing seems to work. I just
>> stuck with not able to switch to 1920x1080.
>>
>>
>>
>> I suspect that this is related to my firmware version. I confirmed the
>> latest firmware is installed on my /usr/lib/firmware/ dir. The reason I
>> suspect that it is a firmware issue is that I got the machine just 2 days
>> ago and I have updated windows 10 to build 1709, which is very new. I
>> suspect that windows have updated the GPU's firmware and the linux driver
>> isn't working with it. If so, is there a way to force a firmware load from
>> the linux side (i.e. a downgrade).
>>
>>
>>
>> Other users on the internet has report success with this particular
>> machine with 4.15 kernel. Given that 4.15 doesn't work for me, the only
>> thing that I could think of is the firmware version.
>>
>>
>>
>> Any other ideas?
>>
>>
>>
>>
>>
>> Thanks a lot,
>>
>> Min
>>
>>
>>
>
>
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