Linux Ch340 Driver May 2026

: Transfer 10 MB of random data at 115200 baud, 8N1.

: For standard baud rates up to 115200, the CH340 is indistinguishable from premium chips. At 921600 baud, the CH340 starts showing occasional frame errors (about 0.1%), while the FTDI remains solid. But at 2Mbps, the CH340 surprises—it actually works, though with ~1% error rate. 4. The Driver in Action: Troubleshooting Common Issues Even with a mature driver, things go wrong. Here’s the practical guide. Issue: Device shows up as ttyCH341USB0 instead of ttyUSB0 Cause : You have the legacy ch341.ko driver loaded alongside the new one. Fix : Blacklist the old driver: linux ch340 driver

| Metric | CH340 | FTDI FT232RL | |--------|-------|---------------| | Sustained throughput | 11.2 KB/s | 11.5 KB/s | | Max baud rate (stable) | 2 Mbps | 3 Mbps | | CPU usage @115200 | 0.8% | 0.7% | | Latency (worst-case) | 4 ms | 2 ms | : Transfer 10 MB of random data at 115200 baud, 8N1