Re: any gotchas for AMD CPUs (esp. Ryzen 7 5825 and similar) with 10.1?

On Wed, Aug 06, 2025 at 09:45:05AM +0000, Steve Blinkhorn wrote:
> I am attracted to some machines with AMD Ryzen 7 5825 (and simuilar)
> CPUs  I can see that the associated graphics processing is compatible
> with NetBSD/amd64 10.1 and I've emailed the manufacturer's
> support service to ask for details of chipsets etc. for WiFi, Ethernet
> etc.

Wifi is going to be problematic for the future until the wifi refresh
branch gets finished - and that would be a post-11 kernel, I suspect.
I've had moderately-OK luck with the run and urtwn USB devices, which
both do 802.11n - so, not the speediest. Setting up wpa_supplicant is
still annoying, although sysinst puts in pretty good defaults.

My 4655G system has been pretty much troublefree; my mobo has a
built-in re(4) which works fine, although I got a rge(4) pci card
which does 1G/2.5G/5G for USD$20-ish and I haven't seen any
problems with it at 1Gb speeds.

The only real bug I've encountered is that if a monitor (or something
pretending to be a monitor) isn't connected at boot time, the system
hangs sometime after efiboot.  (I worked around this with one of
the HDMI dummy plugs, although I imagine one of the VGA dummy plugs
would work just fine, too.)

pkgsrc/sysutils/estd seems to handle twiddling the
machdep.cpu.frequency.target sysctls without any issues.

I have not tried doing X with the builtin radeon graphics.