Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Davide Corrado]

Hello. This resolution is supported by the Apu and the motherboard specs.
Will try what you suggest and let you know

Il Lun 4 Gen 2021, 12:10 Christian König 
ha scritto:

> Hi Davide,
>
> adding a few of our AMD display people.
>
> In general as already suggested by others opening a bug report to track
> this is the right thing to do.
>
> In the past we had a few bug reports like this because amdgpu is more
> strict in checking hardware limitations.
>
> For example it can be that your HDMI port on the board can only handle a
> certain maximum pixel clock, but radeon is ignoring this while amdgpu isn't.
>
> What you can try to do is to manually override the used mode, e.g. copy
> the modeline used when radeon is active and manually add that using xrandr
> when amdgpu is active and see if it works or not.
>
> Regards,
> Christian.
>
> Am 02.01.21 um 19:50 schrieb Davide Corrado:
>
> hello, I'd like to report this issue that I am having since I updated my
> display (samsung U28E590). The amdgpu does not support the native
> resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
> connection (I tried both, same results), the maximum supported refresh is
> 30Hz, so I'm stuck with that (don't have a displayport). The radeon module
> works fine, I'm having this issue just when I use amdgpu (which I'd like
> to, because performance is better).
>
> Some info of my hardware:
>
> cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
> kernel version (I tried different ones and different linux distros, same
> results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
> x86_64 x86_64 x86_64 GNU/Linux
> Monitor: Samsung U28E590.
>
> description:
> If I boot the system using amdgpu and no video mode selection, the system
> boots but I don't get a screen during boot and in wayland. I can connect
> using ssh, so the system is running fine, just no display; If I force a
> full HD resolution with "video:" in the kernel line, I can see the boot
> process but the screen disappears when wayland starts (because the default
> resolution is 3840x2160@30Hz). Using a full HD monitor results in no
> issues, so it must be related to this very 4k resolution.
>
> As I have already stated, radeon module works with the same
> software/hardware configuration.
> thanks you so much for your time :-)
>
> --
> Davide Corrado
> UNIX Team Leader
>
> Via Abramo Lincoln, 25
> 20129 Milano
>
> Tel +39 3474259950
>
> ___
> amd-gfx mailing 
> listamd-gfx@lists.freedesktop.orghttps://lists.freedesktop.org/mailman/listinfo/amd-gfx
>
>
>
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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Davide Corrado]

Btw, should the driver switch to the lower supported resolution then?

Il Lun 4 Gen 2021, 13:04 Davide Corrado  ha
scritto:

> Hello. This resolution is supported by the Apu and the motherboard specs.
> Will try what you suggest and let you know
>
> Il Lun 4 Gen 2021, 12:10 Christian König 
> ha scritto:
>
>> Hi Davide,
>>
>> adding a few of our AMD display people.
>>
>> In general as already suggested by others opening a bug report to track
>> this is the right thing to do.
>>
>> In the past we had a few bug reports like this because amdgpu is more
>> strict in checking hardware limitations.
>>
>> For example it can be that your HDMI port on the board can only handle a
>> certain maximum pixel clock, but radeon is ignoring this while amdgpu isn't.
>>
>> What you can try to do is to manually override the used mode, e.g. copy
>> the modeline used when radeon is active and manually add that using xrandr
>> when amdgpu is active and see if it works or not.
>>
>> Regards,
>> Christian.
>>
>> Am 02.01.21 um 19:50 schrieb Davide Corrado:
>>
>> hello, I'd like to report this issue that I am having since I updated my
>> display (samsung U28E590). The amdgpu does not support the native
>> resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
>> connection (I tried both, same results), the maximum supported refresh is
>> 30Hz, so I'm stuck with that (don't have a displayport). The radeon module
>> works fine, I'm having this issue just when I use amdgpu (which I'd like
>> to, because performance is better).
>>
>> Some info of my hardware:
>>
>> cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
>> kernel version (I tried different ones and different linux distros, same
>> results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
>> x86_64 x86_64 x86_64 GNU/Linux
>> Monitor: Samsung U28E590.
>>
>> description:
>> If I boot the system using amdgpu and no video mode selection, the system
>> boots but I don't get a screen during boot and in wayland. I can connect
>> using ssh, so the system is running fine, just no display; If I force a
>> full HD resolution with "video:" in the kernel line, I can see the boot
>> process but the screen disappears when wayland starts (because the default
>> resolution is 3840x2160@30Hz). Using a full HD monitor results in no
>> issues, so it must be related to this very 4k resolution.
>>
>> As I have already stated, radeon module works with the same
>> software/hardware configuration.
>> thanks you so much for your time :-)
>>
>> --
>> Davide Corrado
>> UNIX Team Leader
>>
>> Via Abramo Lincoln, 25
>> 20129 Milano
>>
>> Tel +39 3474259950
>>
>> ___
>> amd-gfx mailing 
>> listamd-gfx@lists.freedesktop.orghttps://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>>
>>
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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Davide Corrado]

SOLVED

I opened a ticket here:

https://gitlab.freedesktop.org/drm/amd/-/issues/1425

and they suggested, at the end, the same hint (amdgpu.dc=1).

... which, I was sure, I already tried with no results. Maybe I just
misspelled it, and it didn't work.

It's working now, thank you so much for your help.





On Mon, Jan 4, 2021 at 3:01 PM Deucher, Alexander 
wrote:

> [AMD Official Use Only - Internal Distribution Only]
>
> You might try enabling DC (the newer modesetting infrastructure).  Append
> amdgpu.dc=1 to the kernel command line in grub.
>
> Alex
>
> --
> *From:* Davide Corrado 
> *Sent:* Saturday, January 2, 2021 1:50 PM
> *To:* Deucher, Alexander 
> *Cc:* Koenig, Christian ; airl...@linux.ie <
> airl...@linux.ie>; dan...@ffwll.ch ;
> amd-...@lists.freedesktop.org ;
> dri-devel@lists.freedesktop.org ;
> linux-ker...@vger.kernel.org 
> *Subject:* amdgpu does not support 3840x2160@30Hz on kaveri apu
>
> hello, I'd like to report this issue that I am having since I updated my
> display (samsung U28E590). The amdgpu does not support the native
> resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
> connection (I tried both, same results), the maximum supported refresh is
> 30Hz, so I'm stuck with that (don't have a displayport). The radeon module
> works fine, I'm having this issue just when I use amdgpu (which I'd like
> to, because performance is better).
>
> Some info of my hardware:
>
> cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
> kernel version (I tried different ones and different linux distros, same
> results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
> x86_64 x86_64 x86_64 GNU/Linux
> Monitor: Samsung U28E590.
>
> description:
> If I boot the system using amdgpu and no video mode selection, the system
> boots but I don't get a screen during boot and in wayland. I can connect
> using ssh, so the system is running fine, just no display; If I force a
> full HD resolution with "video:" in the kernel line, I can see the boot
> process but the screen disappears when wayland starts (because the default
> resolution is 3840x2160@30Hz). Using a full HD monitor results in no
> issues, so it must be related to this very 4k resolution.
>
> As I have already stated, radeon module works with the same
> software/hardware configuration.
> thanks you so much for your time :-)
>
> --
> Davide Corrado
> UNIX Team Leader
>
> Via Abramo Lincoln, 25
> 20129 Milano
>
> Tel +39 3474259950
>


-- 
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UNIX Team Leader

Via Abramo Lincoln, 25
20129 Milano

Tel +39 3474259950
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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Deucher, Alexander]

[AMD Official Use Only - Internal Distribution Only]

You might try enabling DC (the newer modesetting infrastructure).  Append 
amdgpu.dc=1 to the kernel command line in grub.

Alex


From: Davide Corrado 
Sent: Saturday, January 2, 2021 1:50 PM
To: Deucher, Alexander 
Cc: Koenig, Christian ; airl...@linux.ie 
; dan...@ffwll.ch ; 
amd-...@lists.freedesktop.org ; 
dri-devel@lists.freedesktop.org ; 
linux-ker...@vger.kernel.org 
Subject: amdgpu does not support 3840x2160@30Hz on kaveri apu

hello, I'd like to report this issue that I am having since I updated my 
display (samsung U28E590). The amdgpu does not support the native resolution of 
my new monitor, which is 3840x2160. Using a HDMI or DVI connection (I tried 
both, same results), the maximum supported refresh is 30Hz, so I'm stuck with 
that (don't have a displayport). The radeon module works fine, I'm having this 
issue just when I use amdgpu (which I'd like to, because performance is better).

Some info of my hardware:

cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
kernel version (I tried different ones and different linux distros, same 
results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020 x86_64 
x86_64 x86_64 GNU/Linux
Monitor: Samsung U28E590.

description:
If I boot the system using amdgpu and no video mode selection, the system boots 
but I don't get a screen during boot and in wayland. I can connect using ssh, 
so the system is running fine, just no display; If I force a full HD resolution 
with "video:" in the kernel line, I can see the boot process but the screen 
disappears when wayland starts (because the default resolution is 
3840x2160@30Hz). Using a full HD monitor results in no issues, so it must be 
related to this very 4k resolution.

As I have already stated, radeon module works with the same software/hardware 
configuration.
thanks you so much for your time :-)

--
Davide Corrado
UNIX Team Leader

Via Abramo Lincoln, 25
20129 Milano

Tel +39 3474259950
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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Christian König]

Yes, absolutely. Do you only get a black screen?

That would certainly be a rather big bug.

Christian.

Am 04.01.21 um 13:37 schrieb Davide Corrado:

Btw, should the driver switch to the lower supported resolution then?

Il Lun 4 Gen 2021, 13:04 Davide Corrado > ha scritto:


Hello. This resolution is supported by the Apu and the motherboard
specs. Will try what you suggest and let you know

Il Lun 4 Gen 2021, 12:10 Christian König
mailto:ckoenig.leichtzumer...@gmail.com>> ha scritto:

Hi Davide,

adding a few of our AMD display people.

In general as already suggested by others opening a bug report
to track this is the right thing to do.

In the past we had a few bug reports like this because amdgpu
is more strict in checking hardware limitations.

For example it can be that your HDMI port on the board can
only handle a certain maximum pixel clock, but radeon is
ignoring this while amdgpu isn't.

What you can try to do is to manually override the used mode,
e.g. copy the modeline used when radeon is active and manually
add that using xrandr when amdgpu is active and see if it
works or not.

Regards,
Christian.

Am 02.01.21 um 19:50 schrieb Davide Corrado:

hello, I'd like to report this issue that I am having since I
updated my display (samsung U28E590). The amdgpu does not
support the native resolution of my new monitor, which is
3840x2160/./ Using a HDMI or DVI connection (I tried both,
same results), the maximum supported refresh is 30Hz, so I'm
stuck with that (don't have a displayport). The radeon module
works fine, I'm having this issue just when I use amdgpu
(which I'd like to, because performance is better).

Some info of my hardware:

cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
kernel version (I tried different ones and different linux
distros, same results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon
Dec 21 14:08:22 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Monitor: Samsung U28E590.

description:
If I boot the system using amdgpu and no video mode
selection, the system boots but I don't get a screen during
boot and in wayland. I can connect using ssh, so the system
is running fine, just no display; If I force a full HD
resolution with "video:" in the kernel line, I can see the
boot process but the screen disappears when wayland starts
(because the default resolution is 3840x2160@30Hz). Using a
full HD monitor results in no issues, so it must be related
to this very 4k resolution.

As I have already stated, radeon module works with the same
software/hardware configuration.
thanks you so much for your time :-)

-- 
Davide Corrado

UNIX Team Leader

Via Abramo Lincoln, 25
20129 Milano

Tel +39 3474259950

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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Christian König]

Hi Davide,

adding a few of our AMD display people.

In general as already suggested by others opening a bug report to track 
this is the right thing to do.


In the past we had a few bug reports like this because amdgpu is more 
strict in checking hardware limitations.


For example it can be that your HDMI port on the board can only handle a 
certain maximum pixel clock, but radeon is ignoring this while amdgpu isn't.


What you can try to do is to manually override the used mode, e.g. copy 
the modeline used when radeon is active and manually add that using 
xrandr when amdgpu is active and see if it works or not.


Regards,
Christian.

Am 02.01.21 um 19:50 schrieb Davide Corrado:
hello, I'd like to report this issue that I am having since I updated 
my display (samsung U28E590). The amdgpu does not support the native 
resolution of my new monitor, which is 3840x2160/./ Using a HDMI or 
DVI connection (I tried both, same results), the maximum supported 
refresh is 30Hz, so I'm stuck with that (don't have a displayport). 
The radeon module works fine, I'm having this issue just when I use 
amdgpu (which I'd like to, because performance is better).


Some info of my hardware:

cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
kernel version (I tried different ones and different linux distros, 
same results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 
2020 x86_64 x86_64 x86_64 GNU/Linux

Monitor: Samsung U28E590.

description:
If I boot the system using amdgpu and no video mode selection, the 
system boots but I don't get a screen during boot and in wayland. I 
can connect using ssh, so the system is running fine, just no display; 
If I force a full HD resolution with "video:" in the kernel line, I 
can see the boot process but the screen disappears when wayland starts 
(because the default resolution is 3840x2160@30Hz). Using a full HD 
monitor results in no issues, so it must be related to this very 4k 
resolution.


As I have already stated, radeon module works with the same 
software/hardware configuration.

thanks you so much for your time :-)

--
Davide Corrado
UNIX Team Leader

Via Abramo Lincoln, 25
20129 Milano

Tel +39 3474259950

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amdgpu does not support 3840x2160@30Hz on kaveri apu

[Davide Corrado]

hello, I'd like to report this issue that I am having since I updated my
display (samsung U28E590). The amdgpu does not support the native
resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
connection (I tried both, same results), the maximum supported refresh is
30Hz, so I'm stuck with that (don't have a displayport). The radeon module
works fine, I'm having this issue just when I use amdgpu (which I'd like
to, because performance is better).

Some info of my hardware:

cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
kernel version (I tried different ones and different linux distros, same
results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
Monitor: Samsung U28E590.

description:
If I boot the system using amdgpu and no video mode selection, the system
boots but I don't get a screen during boot and in wayland. I can connect
using ssh, so the system is running fine, just no display; If I force a
full HD resolution with "video:" in the kernel line, I can see the boot
process but the screen disappears when wayland starts (because the default
resolution is 3840x2160@30Hz). Using a full HD monitor results in no
issues, so it must be related to this very 4k resolution.

As I have already stated, radeon module works with the same
software/hardware configuration.
thanks you so much for your time :-)

-- 
Davide Corrado
UNIX Team Leader

Via Abramo Lincoln, 25
20129 Milano

Tel +39 3474259950
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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Davide Corrado]

Cool, thanks!

Il Dom 3 Gen 2021, 12:06 Mike Lothian  ha scritto:

> Hi
>
> You're probably best reporting the bug here:
>
> https://gitlab.freedesktop.org/drm/amd/-/issues
>
> Attach the output of dmesg from both Radeon and AMDGPU and the compositor
> / Wayland logs (as you're not using X)
>
> Cheers
>
> Mike
>
>
>
> On Sun, 3 Jan 2021, 06:32 Davide Corrado,  wrote:
>
>> hello, I'd like to report this issue that I am having since I updated my
>> display (samsung U28E590). The amdgpu does not support the native
>> resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
>> connection (I tried both, same results), the maximum supported refresh is
>> 30Hz, so I'm stuck with that (don't have a displayport). The radeon module
>> works fine, I'm having this issue just when I use amdgpu (which I'd like
>> to, because performance is better).
>>
>> Some info of my hardware:
>>
>> cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
>> kernel version (I tried different ones and different linux distros, same
>> results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
>> x86_64 x86_64 x86_64 GNU/Linux
>> Monitor: Samsung U28E590.
>>
>> description:
>> If I boot the system using amdgpu and no video mode selection, the system
>> boots but I don't get a screen during boot and in wayland. I can connect
>> using ssh, so the system is running fine, just no display; If I force a
>> full HD resolution with "video:" in the kernel line, I can see the boot
>> process but the screen disappears when wayland starts (because the default
>> resolution is 3840x2160@30Hz). Using a full HD monitor results in no
>> issues, so it must be related to this very 4k resolution.
>>
>> As I have already stated, radeon module works with the same
>> software/hardware configuration.
>> thanks you so much for your time :-)
>>
>> --
>> Davide Corrado
>> UNIX Team Leader
>>
>> Via Abramo Lincoln, 25
>> 20129 Milano
>>
>> Tel +39 3474259950
>> ___
>> amd-gfx mailing list
>> amd-...@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>
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Re: amdgpu does not support 3840x2160@30Hz on kaveri apu

[Mike Lothian]

Hi

You're probably best reporting the bug here:

https://gitlab.freedesktop.org/drm/amd/-/issues

Attach the output of dmesg from both Radeon and AMDGPU and the compositor /
Wayland logs (as you're not using X)

Cheers

Mike



On Sun, 3 Jan 2021, 06:32 Davide Corrado,  wrote:

> hello, I'd like to report this issue that I am having since I updated my
> display (samsung U28E590). The amdgpu does not support the native
> resolution of my new monitor, which is 3840x2160*.* Using a HDMI or DVI
> connection (I tried both, same results), the maximum supported refresh is
> 30Hz, so I'm stuck with that (don't have a displayport). The radeon module
> works fine, I'm having this issue just when I use amdgpu (which I'd like
> to, because performance is better).
>
> Some info of my hardware:
>
> cpu: AMD A10-7870K Radeon R7, 12 Compute Cores 4C+8G
> kernel version (I tried different ones and different linux distros, same
> results!): 5.9.16-200.fc33.x86_64 #1 SMP Mon Dec 21 14:08:22 UTC 2020
> x86_64 x86_64 x86_64 GNU/Linux
> Monitor: Samsung U28E590.
>
> description:
> If I boot the system using amdgpu and no video mode selection, the system
> boots but I don't get a screen during boot and in wayland. I can connect
> using ssh, so the system is running fine, just no display; If I force a
> full HD resolution with "video:" in the kernel line, I can see the boot
> process but the screen disappears when wayland starts (because the default
> resolution is 3840x2160@30Hz). Using a full HD monitor results in no
> issues, so it must be related to this very 4k resolution.
>
> As I have already stated, radeon module works with the same
> software/hardware configuration.
> thanks you so much for your time :-)
>
> --
> Davide Corrado
> UNIX Team Leader
>
> Via Abramo Lincoln, 25
> 20129 Milano
>
> Tel +39 3474259950
> ___
> amd-gfx mailing list
> amd-...@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>
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