Suspend and Resume with the Hauppauge 2250 card

[TV_Hacker]

I was able to get wake from suspend working with the Hauppauge 2250 on Ubuntu 24.04 Linux.

The driver in use is saa7164.

The driver would lock up once the system went to suspend so resume would result in an unusable system.
I would have to completely power down the system to get it working again.
I thought I had it solved by unloading the driver, but the driver would fail when trying to reload upon resume. 
Solution was to clear memory cache before suspend.

Solution:

/usr/lib/systemd/system-sleep/saa7164_driver_handler.sh
Need execute permissions on the script:
(-rwxr-xr-x 1 root root 584 Jan  7 23:23 saa7164_driver_handler.sh)

#!/bin/bash
DRIVER="saa7164" # Replace driver_name with your specific driver

case "${1}" in
    pre)
        # Actions to take BEFORE suspend
        echo "Stopping nextpvr-server..."
        systemctl stop nextpvr-server
        echo "Unloading $DRIVER modules..."
        modprobe -r $DRIVER
        sync
        echo 3 > /proc/sys/vm/drop_caches
        ;;
    post)
        # Actions to take AFTER resume
        echo "Loading $DRIVER modules..."
        modprobe $DRIVER
        echo "Starting nextpvr-server..."
        systemctl start nextpvr-server
        ;;
esac

I also required the devices to be loaded before the nextpvr-server would be allow to start

In /usr/lib/systemd/system/nextpvr-server.service

[Unit]
Description=NextPVRServer
After=network-online.target
Wants=dev-dvb-adapter0-frontend0.device
After=dev-dvb-adapter0-frontend0.device
Wants=dev-dvb-adapter1-frontend0.device
After=dev-dvb-adapter1-frontend0.device

[mvallevand]

Just out of curiosity are you saying that running pkill DeviceHostLinux instead of stopping the server didn't work on sleep? I have the 2250 and it basically worked using something similar to your script based on this https://wiki.mythtv.org/wiki/Suspend_and_saa7164

Martin