HC Crashes (Sometimes) upon resuming from standby

[pzh99]

Device manufacturer
Valve

Device model
Steam Deck LCD

Handheld Companion Version
0.28.2.3

Describe the bug
I put my device in standby, and upon waking it up again. My controls aren't working, fan sounds like a jet engine, and the performance sometimes tanks. Come to find out that HC has crashed and I need to re-launch for everything to go back to normal.

To Reproduce
Steps to reproduce the behavior:

1. Simply put the device to sleep (Standby)
2. Wake up again, sometimes HC will crash and must be restarted to continue using.

Expected behavior
HC should not crash upon resuming.

[Valkirie]

When it happens, can you please upload the last log file from %localappdata% HandheldCompanion, logs?

[Marctraider]

When it happens, can you please upload the last log file from %localappdata% HandheldCompanion, logs?

Happens on my Legion Go 2 as well,

HandheldCompanion-20260216.log

[cutecycle]

confirming on deck

[Emtee88]

Can we start fixing core issues with HC first before we keep adding new functionality? Crashes are still common.

[xh4528]

Device model
Steam Deck LCD

Handheld Companion Version
0.28.6.4

2026-04-12 15:02:13.844 +08:00 [ERR] Exception of type 'Nefarius.ViGEm.Client.Exceptions.VigemInvalidTargetException' was thrown.
2026-04-12 15:02:14.275 +08:00 [INF] GPUManager is "Halted"
2026-04-12 15:02:14.278 +08:00 [INF] 模拟 XBOX 360 手柄 disconnected
2026-04-12 15:02:14.286 +08:00 [INF] DSUServer has stopped
2026-04-12 15:02:14.702 +08:00 [INF] TimerManager has stopped
2026-04-12 15:02:14.704 +08:00 [INF] InputsManager has stopped
2026-04-12 15:02:14.761 +08:00 [INF] Platform LibreHardwarePlatform is "Stopping"
2026-04-12 15:02:14.763 +08:00 [INF] Tasks completed. System can now suspend.
2026-04-12 15:02:15.207 +08:00 [INF] Power profile 默认 applied
2026-04-12 15:02:15.605 +08:00 [INF] XInput controller 支持 Windows 的 XBOX 360 手柄 unplugged, cycling false

[xh4528]

Device model Steam Deck LCD

Handheld Companion Version 0.28.6.4

2026-04-12 15:02:13.844 +08:00 [ERR] Exception of type 'Nefarius.ViGEm.Client.Exceptions.VigemInvalidTargetException' was thrown. 2026-04-12 15:02:14.275 +08:00 [INF] GPUManager is "Halted" 2026-04-12 15:02:14.278 +08:00 [INF] 模拟 XBOX 360 手柄 disconnected 2026-04-12 15:02:14.286 +08:00 [INF] DSUServer has stopped 2026-04-12 15:02:14.702 +08:00 [INF] TimerManager has stopped 2026-04-12 15:02:14.704 +08:00 [INF] InputsManager has stopped 2026-04-12 15:02:14.761 +08:00 [INF] Platform LibreHardwarePlatform is "Stopping" 2026-04-12 15:02:14.763 +08:00 [INF] Tasks completed. System can now suspend. 2026-04-12 15:02:15.207 +08:00 [INF] Power profile 默认 applied 2026-04-12 15:02:15.605 +08:00 [INF] XInput controller 支持 Windows 的 XBOX 360 手柄 unplugged, cycling false

Device model
Steam Deck LCD

Handheld Companion Version
0.28.6.12

AMD GPU 0405 driver
32.0.11002.3007 (OLED APU driver 2024/6/6)

I accidentally solved the problem of HC failing to work after waking from sleep. Those who need it can try this.

This video shows how to install the OLED driver for an LCD (with an AMD panel).
https://www.youtube.com/watch?v=4VoO9CIsRdM

Now, pressing the power button to long-sleep and then waking the device will cause SteamDeck to vibrate once within 10 seconds, and HC will work normally. No manual restart of HC is needed, and there are no system error pop-ups.

[Marctraider]

Funny. My logs also show that it appears to be AMD (ADLX) related:

#1418