u/External_Fennel_9009

Hey, hoping someone here has solved this. My external USB-C monitor fails to detect on every cold boot and restart. Unplugging and replugging the cable after Windows loads fixes it instantly, but I'd love a permanent fix.

**Setup:**

- HP Victus 16-s1023dx (Ryzen 7 8845HS, RTX 4070)

- Windows 11 Home 25H2, Build 26200.8457

- Monitor: Deco Gear DGVIEW495K connected via USB-C (DisplayPort Alt Mode, 120Hz)

- USB-C port has SS⚡ symbol — confirmed DP Alt Mode support

**Already tried:**

- Disabled Fast Startup

- Disabled USB selective suspend in Device Manager and via powercfg

- HcDisableSelectiveSuspend = 1 registry edit

- Latest HP BIOS/firmware and AMD chipset drivers installed

- Locked monitor OSD input to USB-C

- PowerShell Task Scheduler script at login to cycle USB Root Hubs, UCM-UCSI ACPI Device, and the monitor's USB hub (VID_05E3&PID_0608)

**What I found via event logs:**

Checked Microsoft-Windows-Kernel-PnP/Device Management log. On a successful manual replug, Windows freshly registers DISPLAY\VLK4900 and USB\VID_05E3&PID_0608. On cold boot, neither device ever appears — meaning the DisplayPort Alt Mode handshake never initiates at the hardware level.

Software cycling the USB stack triggers the USB reconnect sound but doesn't bring the monitor on, because the physical Alt Mode power negotiation never happens through software alone.

This seems to be a UCM-UCSI firmware issue specific to AMD Ryzen + Windows 11 25H2. Anyone run into this and found a fix beyond the replug workaround?

Hey everyone, posting this in case anyone else has run into this and found a fix, and also to get it on HP's radar.

**My setup:**

- HP Victus 16-s1023dx (Ryzen 7 8845HS, RTX 4070)

- Windows 11 Home 25H2 (Build 26200.8457)

- Deco Gear DGVIEW495K 49" ultrawide connected via USB-C at 120Hz

**The problem:**

Every single boot or restart, the monitor isn't detected. It just stays black. Win+Shift+Ctrl+B does nothing. The only fix is unplugging and replugging the USB-C cable after Windows loads, which works instantly.

**What I've already tried:**

- Disabled Fast Startup

- Disabled USB selective suspend (Device Manager + powercfg)

- HcDisableSelectiveSuspend registry tweak

- Latest HP BIOS/firmware update

- Latest AMD chipset drivers

- Locked monitor OSD to USB-C input (disabled auto-detect)

- PowerShell startup script to cycle the USB stack at login (UCM-UCSI, Root Hubs, the monitor's specific USB hub VID_05E3&PID_0608)

**What the event logs show:**

When I manually replug, Windows logs DISPLAY\VLK4900 and USB\VID_05E3&PID_0608 being detected fresh. On cold boot, neither ever appears in the log — the DisplayPort Alt Mode handshake simply never happens.

This points to the UCM-UCSI ACPI controller not reinitializing Alt Mode on boot, which is a firmware issue that can't be fixed in software.

Anyone else seen this on their Victus? Any fixes I haven't tried? Hoping HP pushes a BIOS fix at some point.