Environment:
iPhone 16, iOS 26.3.1
Host PC: Mac mini M1, macOS 14.6.1

Symptoms:
1. In the Steam Link app on the iPhone, all three indicators — host computer, touch controller, and connection status — show green check marks, and then I tap Start Playing.

2. Steam launches in Big Picture mode on the host PC.

3. The host PC’s screen does not appear on the iPhone, and Steam restarts on the host PC.

4. The iPhone then returns to the main screen.

5. This repeats indefinitely.

Additional details:
Steam Link Remote Play was working normally until last night, but it stopped working starting this morning. I have tried various troubleshooting steps, including reinstalling Steam, reinstalling the game, and reinstalling Steam Link, but the issue has not been resolved.

After checking streaming_log.txt, I found what appears to be the relevant log entries at the very bottom:

[2026-03-16 11:59:38][36.435911] Driver deadlock in hardware accelerated desktop capture, restarting
[2026-03-16 11:59:38][36.435925] Driver deadlock in hardware accelerated desktop capture, aborting