On Sat, Oct 13, 2018 at 12:39:35PM +0200, Manuel Bouyer wrote: > On Tue, Oct 09, 2018 at 04:13:32PM +0100, Patrick Welche wrote: > > I purchased a couple of USB-serial adapters. Unfortunately, given the lack > > of detail in the descriptions, they turned out to be > > > > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54 > > > > According to > > > > https://nxr.netbsd.org/xref/src/sys/dev/usb/uchcom.c#40 > > > > this is "the worst USB-serial chip in the world." > > > > Do these work at all? (Get "tip: link down", then change to a > > uplcom0: Prolific Technology Inc. and all is well.) > > I use one: > uchcom0: QinHeng Electronics (0x1a86) USB2.0-Serial (0x7523), rev 1.10/2.54, > addr 3 > uchcom0: CH341 detected > ucom0 at uchcom0 > > to connect to an ARM board's console. I didn't notice problems so far ...
Just had a proper go, and see: uchcom0: QinHeng Electronics (0x1a86) USB2.0-Ser! (0x7523), rev 1.10/2.54, addr 3 uchcom0: CH341 detected ucom3 at uchcom0 uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED uchcom0: cannot reset: STALLED ... I note that you have the full word "Serial"... Cheers, Patrick