From 2901cf43bf45ff322fb62286c3bf1594b55c20ee Mon Sep 17 00:00:00 2001 From: 53hornet Date: Tue, 7 Sep 2021 14:23:27 -0400 Subject: chore: rename html to php, add donate/payments page, update cv --- drafts/dell-dock.php | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 drafts/dell-dock.php (limited to 'drafts/dell-dock.php') diff --git a/drafts/dell-dock.php b/drafts/dell-dock.php new file mode 100644 index 0000000..4a9dd9a --- /dev/null +++ b/drafts/dell-dock.php @@ -0,0 +1,102 @@ +

Make Your Docking Station Work for You (on FreeBSD)

+ +

+ I have a Dell Latitude E-series laptop running FreeBSD 12.2-RELEASE. I also + have a Dell E-Port II docking station on my desk. I wanted to be able to take + my shut, sleeping laptop and plop it down on the docking station, hit the dock + power button, and have the laptop wake up and switch over to all of the + docking station peripherals. So I did it! And now I'm going to write about it + so I don't forget how. You need to know a little bit about FreeBSD + sysctl knobs, display outputs in X, sound devices, and + ifconfig networking. +

+ +

Switching from Ethernet to WiFi and Back Again, Seamlessly

+ +

+ FreeBSD doesn't magically swap from wireless to wired connections by default, + but there's an easy way to remedy this: link failover. I recommend reading the + FreeBSD handbook page on network aggregation + as it's where I found out about link aggregation and failover. Basically, + aggregation lets you bind two of your network interfaces together into a + single virtual interface. Failover lets your traffic continue moving as long + as one of the aggregated interfaces has is connected. + Here's what I had to do: +

+ +
    +
  1. + Bind the wireless network interface (wlan0) to the MAC address of the wired + interface (em0) +
  2. +
  3. Create a lagg interface using the two network interfaces
  4. +
  5. Bind the lagg interface to an IP address, preferably with DHCP
  6. +
+ +

All of this is configured in my rc.conf:

+ +

+wlans_iwn0="wlan0" # <- wlan0 device should use the iwn driver
+ifconfig_wlan0="WPA" # <- wlan0 should use WPA (wpa_supplicant) to connect to wireless SSIDs
+create_args_wlan0="wlanaddr 5c:26:0a:06:c1:d6" # <- wlan0 MAC address is set to em0 device MAC address
+ifconfig_em0="up" # <- enable em0 (ethernet) device
+cloned_interfaces="lagg0" # <- create cloned interface lagg0
+ifconfig_lagg0="up laggproto failover laggport em0 laggport wlan0 DHCP" # <- configure lagg0 interface to act as a failover lagg protocol over em0 and wlan0
+
+ +

+ In practice, the preferred device is em0, or my ethernet NIC. + FreeBSD will always try to use that first. If it's disconnected, such as when + the laptop is removed from the dock, the wireless device (wlan0) + will take over. This transition happens instantly, and without interrupting + traffic; active transactions aren't cut short for example. +

+ +

Sleeping on Lid Close Except When Docked

+ +

+ This is an easy one. You can use sysctl to configure what happens + when a laptop lid is closed. I wanted the lid closing while undocked to + suspend (put the laptop to sleep). When it's docked however, I don't use the + internal display and wanted to be able to shut the lid and leave it shut. If you read ACPI(4) in the manual, you'll find this little passage: +

+ +
+
+hw.acpi.lid_switch_state + Suspend state (S1-S5) to enter when the lid switch (i.e., a + notebook screen) is closed. Default is "NONE" (do nothing). +
+
+
+

I changed this value a long time ago so closing the lid suspends the laptop. You can check with sysctl:

+ +
+
+$ sysctl hw.acpi.lid_switch_state
+hw.acpi.lid_switch_state: S3
+
+
+ +

Now, if I wanted to disable this functionality, I would just change this parameter as root:

+ +
+
+$ doas sysctl hw.acpi.lid_switch_state=NONE
+hw.acpi.lid_switch_state: NONE -> NONE
+
+
+ +This change takes effect immediately. I can open and close the lid and nothing happens but turning off the screen. Awesome. + +

Swapping Primary Display Outputs (Also Nvidia Screen-Tearing)

+ +

Switching Default Sound Device

+ +

Putting It All Together (Scripts Are Glue)

+ +

What I Didn't Have to Do

+ +usb devices, battery/charging -- cgit v1.2.3