https://bugs.freedesktop.org/show_bug.cgi?id=103953
Bug ID: 103953 Summary: [DC] Polaris10: Missing modes when enabling DC Product: DRI Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: freedesktop-bugzilla@dominik-paulus.de
Created attachment 135751 --> https://bugs.freedesktop.org/attachment.cgi?id=135751&action=edit dmesg with amdgpu.dc=1
I have a Dell U2713HM connected to a Radeon RX470 (MSI board, 'Radeon RX470 Gaming 4G') over dual-link DVI on Linux 4.15-rc1. When enabling DC (Kernel commandline amdgpu.dc=1), the monitors native resolution of 2560x1440 is not detected, when falling back to default modesetting, everything works fine. Xorg.log and (relevant parts) of dmesg for both amdgpu.dc=1 and =0 are attached.