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From: "Gaël HERMET" <linuzel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: RX 580 and 5K displays, bandwidth validation failed whith multiple monitors
Date: Mon, 27 May 2019 16:58:50 +0200	[thread overview]
Message-ID: <1558969130.2.0@gmail.com> (raw)

Hi,

I have been facing an issue with my 5K display (iiyama ProLite 
XB2779QQS-S1).

It works fine as long as it is the only active monitor, as soon as I 
activate another monitor the main one (5k) can't display more than 4k.

Debug using "echo 0x4 > /sys/module/drm/parameters/debug" show this :
mai 23 09:01:22 bureau-gael /usr/lib/gdm3/gdm-x-session[3465]: (EE) 
AMDGPU(0): failed to set mode: Invalid argument
mai 23 09:01:22 bureau-gael kernel: [drm:dce112_validate_bandwidth 
[amdgpu]] dce112_validate_bandwidth: Bandwidth validation failed!

I disabled the check by forcing is_display_configuration_supported to 
return true in dce_calcs.c and it works fine.

Anything I can do to correct this bandwidth calculation ?


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             reply	other threads:[~2019-05-27 14:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-27 14:58 Gaël HERMET [this message]
     [not found] ` <1558969130.2.0-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2019-05-30 16:01   ` RX 580 and 5K displays, bandwidth validation failed whith multiple monitors Harry Wentland
     [not found]     ` <c1f8b7b0-ad49-81cb-a304-ba7193913cc8-5C7GfCeVMHo@public.gmane.org>
2019-06-04 13:10       ` Gaël HERMET

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