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--- tech:linux:ubuntu:start [2022/03/05 22:31]
rk4n3
+++ tech:linux:ubuntu:start [2023/04/21 10:11] (current)
rk4n3
@@ Line 26: / Line 26: @@
     * For wifi: wpasupplicant
     * For audio: jack2 pulseaudio pulseaudio-module-jack qjackctl
-    * For X: xorg xinit xauth x11-xserver-utils xterm notion fvwm stalonetray
+    * For X: xorg xinit xauth x11-xserver-utils xterm notion fvwm stalonetray xscreensaver xscreensaver-gl-extra xscreensaver-data-extra
     * tigervnc-viewer
   * Networking ''/etc/netplan/whateveryourfilenameis.yaml'': \\ //(Note: ''wifis'' section optional)//<code yaml>network:
@@ Line 51: / Line 51: @@
 ==== Bridged Networking ====
   * Packages: ''bridge-utils''
-  * Populate ''/etc/sysctl.d/bridge.conf'' with:
+  * Populate ''/etc/sysctl.d/20-bridge.conf'' with:<code>net.bridge.bridge-nf-call-ip6tables=0
-    <code>net.bridge.bridge-nf-call-ip6tables=0
+  net.bridge.bridge-nf-call-iptables=0
-net.bridge.bridge-nf-call-iptables=0
+  net.bridge.bridge-nf-call-arptables=0</code>
-net.bridge.bridge-nf-call-arptables=0</code>
+  * Populate ''/etc/udev/rules.d/99-bridge.rules'' with:<code>ACTION=="add",SUBSYSTEM=="module",KERNEL=="br_netfilter",RUN+="/sbin/sysctl -p /etc/sysctl.d/20-bridge.conf"</code>
-  * Populate ''/etc/udev/rules.d/99-bridge.rules'' with:
-    <code>ACTION=="add",SUBSYSTEM=="module",KERNEL=="br_netfilter",RUN+="/sbin/sysctl -p /etc/sysctl.d/20-bridge.conf"</code>
   * In ''/etc/netplan/whateveryourfilenameis.yaml'':<code yaml>network:
   version: 2
@@ Line 136: / Line 134: @@
         * Create filesystem directly on the physical device
         * Add entry to ''/etc/fstab'' to mount the filesystem at desired location
-  * Sample VM start-up script: <code bash>
+  * Sample VM start-up script: [[:tech:virt:start|startvm]]
-#!/bin/bash
-VMN=yourvmname
-VNC="12"
-MAC0="DE:AD:BE:EF:00:12"
-VMH=/var/lib/kvm
-CPUT=EPYC
-CPUS=4
-VMM=8G
-VGA="-vga virtio -display gtk"
-# Headless ...
-#VGA="-vnc localhost:${VNC} -daemonize"
-VGN="yourvgname"
-SIM=
-HD0=
-HD1=
-HD2=
-NIC0=
-NIC1=
-TPM=
-SND=
-# Boot device - d=cdrom, c=disk
-BOOT="-boot c"
-function initTPM {
-	TPD=$(ps -ef | grep swtpm | grep -v grep)
-	if [ "${TPM}" != "" -a "${TPD}" == "" ]; then
-		swtpm socket -d --tpmstate dir=/var/lib/kvm/${VMN}/tpm --ctrl type=unixio,path=/var/lib/kvm/${VMN}/tpm/sock --log file=tpm.log,level=20 --tpm2
-	else echo "NFO=>>> software TPM daemon detected, skipping its startup" ; fi
-}
-function vmOptionsWin11 {
-	CPUT=EPYC,kvm_pv_eoi=on
-#	SIM="-cdrom ${VMH}/iso/Win11_English_x64v1.iso"
-#	SIM="-cdrom ${VMH}/iso/virtio-win-0.1.208.iso"
-	HD0="-hda vda"
-	HD1="-drive file=/dev/${VGN}/dwin,index=1,media=disk,format=raw"
-#	NIC0="-netdev bridge,id=${VMN}eth0,br=br0 -device e1000,netdev=${VMN}eth0,mac=${MAC0}"
-	NIC0="-netdev bridge,id=${VMN}eth0,br=br0 -device virtio-net-pci,netdev=${VMN}eth0,mac=${MAC0}"
-	TPM="-bios /usr/share/ovmf/OVMF.fd -chardev socket,id=chrtpm,path=/var/lib/kvm/${VMN}/tpm/sock -tpmdev emulator,id=tpm0,chardev=chrtpm -device tpm-tis,tpmdev=tpm0"
-	initTPM
-}
-function vmOptionsLinux {
-#	SIM="-cdrom ${VMH}/iso/ubuntu-20.04.3-live-server-amd64.iso"
-	HD0="-drive file=vda,if=virtio"
-	HD1="-drive file=vdb,if=virtio"
-	HD2="-drive file=/dev/${VGN}/${VMN}home,if=virtio,index=2,media=disk,format=raw"
-	NIC0="-netdev bridge,id=${VMN}eth0,br=br0 -device virtio-net-pci,netdev=${VMN}eth0,mac=${MAC0}"
-}
-function vmOptions {
-	vmOptionsLinux
-#	vmOptionsWin11
-}
-cd ${VMH}/${VMN}
-vmOptions
-qemu-system-x86_64 -machine pc,accel=kvm -name "${VMN}" -cpu ${CPUT} -smp ${CPUS} -m ${VMM} ${BOOT} ${VGA} ${NIC0} ${NIC1} ${HD0} ${HD1} ${HD2} ${SIM} ${TPM} ${SND}
-</code>
 ==== Advanced/Other Virtualization ====
@@ Line 237: / Line 173: @@
   * vim-gtk
   * openssh-server
-  * ksh
   * htop
   * git
@@ Line 262: / Line 197: @@
 ==== Disable PulseAudio auto-spawn ====
-If you want to run Jack for low-latency high-performance audio, you'll need to make sure that Jack can grab your audio interface directly, which means you won't want PulseAudio to grab it on startup.  Disabling PulseAudio auto-spawn is most likely necessary, so you can start it manually after Jack is running:
+If you want to run Jack for low-latency high-performance audio, you'll need to make sure that Jack can
+grab your audio interface directly, which means you won't want PulseAudio to grab it on startup.
+Disabling PulseAudio auto-spawn is most likely necessary, so you can start it manually after Jack is running:
+  * Stop already-running (auto-spawned) instance(s):<code>systemctl --user stop pulseaudio.socket
+systemctl --user stop pulseaudio.service
+sudo systemctl stop pulseaudio
+sudo systemctl disable  pulseaudio</code>
   * Change in ''/etc/pulse/client.conf'': <code>autospawn = no
 daemon-binary = /bin/true
 </code>
+  * Change in ''/etc/pulse/daemon.conf'': <code>daemonize = no</code>
   * Rename startup file: <code bash>mv /etc/rc2.d/S50pulseaudio /etc/rc2.d/K50pulseaudio</code>
+  * Completely disable any depedency service spawning: <code>sudo systemctl mask pulseaudio</code>
 ==== Route PulseAudio through Jack ====
@@ Line 459: / Line 402: @@
 ====== Some Hardware Trivia ======
+==== Mouse lag on Raspberry Pi 4b ====
+In ''/boot/firmware/cmdline.txt'', add to end of line:
+<code>usbhid.mousepoll=8</code>
 ==== ACEPC W5 Pro: wifi ====

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