HP T700h UPS has a serial port. I’m using a USB to RS232 cable/dongle that comes up as /dev/ttyUSB0. First install nut. Next, enable standalone mode in /etc/nut/nut.conf Define the UPS. I’ve called it “hp” but you can give any… Read More
Choppy Airplay with Cambium cnPilot E400 Wifi
TLDR: Disable OCS Problem symptoms Yesterday I experienced very choppy Airplay performance from my MacBook Pro. The video would periodically freeze and the audio drop out. Every few seconds there would be a noticeable gap in the audio and the… Read More
Upgrading M.2 SSD with only one slot
I upgraded a laptop’s M.2 SSD to a larger one, but the (Gigabyte) laptop only had one slot. In Windows 10, hold SHIFT when clicking shutdown to perform full shutdown rather than fast shutdown. Use a live USB of CloneZilla… Read More
Zone minder problem: no image in monitor
Solution:https://forums.zoneminder.com/viewtopic.php?t=24265 Two tweaks must be applied. Part 1 In the web interface, go to options -> paths, and update PATH_ZMS from “/cgi-bin/nph-zms” to “/zoneminder/cgi-bin/nph-zms” Now, I get the following errors in the apache error log: ==> error.log <==[Tue Feb 09… Read More
Mysterious HTTP redirect 302
A mysterious problem surfaced where an Android app making POST requests to an XML api would receive HTTP 302 redirect responses instead of valid 200 responses. Using a web browser with a mobile user agent (admittedly I didn’t try the… Read More
Flickering Dell U2412M LCD on certain grays
I’ve had an annoyance with my otherwise fantastic* Dell U2412M LCD where certain greys appear flickery. It happens on both the display port and the DVI input with a dongle from my Macbook Pro. Today I discovered that there is… Read More