Exynos Usb Device4000 Hot

Exynos USB Device 4000 Hot: Causes, Risks, and Proven Fixes If you have connected your Samsung Galaxy or Exynos-powered device to a computer and noticed an error labeled "Exynos USB Device 4000" accompanied by significant overheating, you aren't alone. This specific error often appears in Windows Device Manager when a phone enters a low-level boot state, and the resulting heat can be alarming.

Case 3: Custom Exynos 5422 Board – Intermittent “hot” on Linux

User symptom: The error appears randomly, sometimes after 2 seconds, sometimes after 2 minutes.
Fix: The USB cable was running near a powerful switching power supply. Shielding and ferrite beads on the cable reduced EMI, and disabling autosuspend removed the final error. exynos usb device4000 hot

• USB Version: USB 3.2 Gen 2x2
• Speed: Up to 20 Gbps
• Power Delivery: PD 3.0
• Protocols: USB, DisplayPort (DP), PCIe
• Power Consumption: Low power consumption design

• Integrate thermal zone for the USB controller; set thermal trip points to reduce link speed or disable high-power features before hitting critical temps.

4.3 Thermal Zone Readout

cat /sys/class/thermal/thermal_zone8/temp   # zone mapped to USB sensor