Has anyone experienced USB/MTP communication issues on the Zephyrus G15 GA503QR (BIOS 416)?
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I’ve been troubleshooting a very strange USB behavior related mainly to MTP data communication.
Current symptoms:
- USB-C connections are often detected only as Power Delivery (PD) devices instead of proper data devices
- When attempting an MTP connection, Windows shows pop-ups related to “connected” and “PD”, almost as if the device was only a USB-C charger rather than a data device
- In MyASUS USB diagnostics, the interface is reported as USB 2.0 in use even when using cables/devices that should support USB 3.x
- Transfer speeds are limited to around 14–16 MB/s
My USB-A port also behaves strangely:
- it provides power/charging normally
- it works with my Astro A50 base station
- but it does NOT recognize my phone for data transfer or MTP communication
Additional information:
- BIOS version: 416
- Ryzen 9 5900HS model
- Windows was freshly reset/reinstalled
- AMD chipset drivers updated
At this point I’m starting to suspect either a firmware/controller issue or some kind of USB/MTP compatibility problem on this BIOS version.
Has anyone seen similar behavior or found a fix?