On 2018-03-15 12:52 AM, Jona Stubbe wrote: > Hi AMD graphics developers, > > I've recently hit a modesetting problem: when I used the DisplayPort KVM > switch that I got yesterday to connect my PC (running Arch Linux) to my 4K > monitor, it only worked in 3 out of about 60 times of switching/replugging > the > cable (the BIOS always manages to put something onscreen, though). > I've tried both graphics cards available to me right now: a Polaris (RX 480) > and a Cayman (HD 6950/6970) and neither of them modesets properly and > reliably.
With the Polaris card, does enabling DC help? (kernel >= 4.15, CONFIG_DRM_AMD_DC=y, amdgpu.dc=1 on the kernel command line) > PS: if there is a shorter-latency way of asking this kind of question (like > an > IRC channel), I'd be interested too :) There is #radeon on FreeNode. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer
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