Date: Thu, 5 Aug 2021 15:42:11 +0200 From: Hans Petter Selasky <hps@selasky.org> To: freebsd-current <freebsd-current@freebsd.org> Subject: AMD Ryzen 5 3400G with Radeon Vega Graphics Message-ID: <e124c3ec-51f2-3dac-68e2-2f6329afcb78@selasky.org>
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Hi, I was lucky to get the hands on a mini-ITX containing a "AMD Ryzen 5 3400G with Radeon Vega Graphics". FreeBSD-13 installed just fine and 4K HDMI output works too with AMDGPU. However I noticed some problems with a webcamd DVB-T receiver, that it had lots of dropouts I couldn't understand. When I looked closer at this it turns out that something was blocking the threads for longer amounts of time, up to 100 ms at random. After some debugging I eventually found: sysctl machdep.idle machdep.idle: acpi machdep.idle_available: spin, mwait, hlt, acpi And when I set it to: sysctl machdep.idle=spin The problems I saw vanished. Anyone else having such experiences with Ryzen? --HPS
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