To confirm if the "driver hot" is a false alarm or real, run:
# Check thermal zone temperatures
cat /sys/class/thermal/thermal_zone*/temp
For DIYers: Budget phones often have dry, ceramic-based thermal paste. unisoc ums9117 driver hot
Due to the diverse nature of devices using the UMS9117 (ranging from basic smartphones to industrial tablets), Unisoc has moved towards a modular kernel driver approach. To confirm if the "driver hot" is a
This content is written for technical support engineers, advanced users, and embedded system developers. This content is written for technical support engineers,
In the context of the UMS9117, "Driver Hot" most accurately refers to the CPU Hotplug Driver. This kernel driver is responsible for dynamically activating and deactivating CPU cores based on system load.
| Action | Effect |
|--------|--------|
| Disable mpdecision (hotplug) | Prevents core parking/unparking spikes |
| Use a custom kernel with 1.0GHz max | Reduces peak power from 2.5W to 1.2W |
| Replace old lithium battery (>2 years) | Lower internal resistance = less heat |
| Keep modem firmware updated | Fixes WCN TX power loops |
Do not try to flash new firmware while the driver is reporting a hot state.