From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 110780] RX 580 and 5K displays, bandwidth validation failed with multiple monitors
Date: Tue, 28 May 2019 08:30:23 +0000 [thread overview]
Message-ID: <bug-110780-502@http.bugs.freedesktop.org/> (raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=110780
Bug ID: 110780
Summary: RX 580 and 5K displays, bandwidth validation failed
with multiple monitors
Product: DRI
Version: unspecified
Hardware: All
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: DRM/AMDgpu
Assignee: dri-devel@lists.freedesktop.org
Reporter: linuzel@gmail.com
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.
I tried a lot of kernel (includig drm-tip and 5.2-rc1) and they all have the
same issue.
My custom kernel with no validation is based on Ubuntu's 5.0.0-15-generic.
If I can help by providing more logs or test something ask and I will do my
best.
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next reply other threads:[~2019-05-28 8:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-28 8:30 bugzilla-daemon [this message]
2019-11-19 9:29 ` [Bug 110780] RX 580 and 5K displays, bandwidth validation failed with multiple monitors bugzilla-daemon
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