sysctl.d: add 00-max-ipv6-route.conf

etc/pipewire/media-session.d/README.md

@@ -3,8 +3,13 @@
 ## USB headset volume problem
 
 2021-06-14: These files shouldn't even exist, the solution below is wrong,
-marking the headset as "Pro-audio" in pavucontrol Settings tab is enough to
-fix it.
+marking the headset as "Pro-audio" in pavucontrol Settings tab and adjusting
+one from `alsamixer` is enough to fix it.
+
+In `alsamixer` having it as pro-audio exposes the sound card in F6 known as
+*Logitech USB Headset* and there I see two siliders, *Headphone* and *Mic*,
+*Headphone* can apparently be 100 and *Mic* muted when not in use to avoid
+it echoing back.
 
 * * * * *
 

etc/sysctl.d/00-max-ipv6-route.conf

@@ -0,0 +1,6 @@
+# I am not sure what this does exactly, this is in response to log prompt
+#    kernel: Route cache is full: consider increasing sysctl net.ipv6.route.max_size.
+# This seems to be somewhat common issue and I have copied the number from
+# 00-quic-go-udp-receive-buffer.conf which links the source
+# https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size
+net.ipv6.route.max_size = 2500000