Dear All, I upgraded the driver for the Prolific to the latest version, now it works fine! Thanks!
It first used a Microsoft driver, dated a few years back. By the way, I'm using WinXP professional. Jeroen PE1RGE Didier Juges schreef: > Hal, > > I have two Prolific adapters on a single hub, which is probably low speed > (it was cheap). They work fine under XP, even though one of them is used > with a program (development system) that has shown some finicky behavior > when driving a serial input JTAG box with the old drivers. The other one > drives my ham radio's serial port. The Thunderbolt is normally plugged into > the hardware serial port COM 1 on this machine, I will try with the Prolific > adapter just for grins. > > Didier KO4BB > > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray >> Sent: Wednesday, June 25, 2008 7:03 PM >> To: Discussion of precise time and frequency measurement >> Subject: Re: [time-nuts] Thunderbolt and USB to RS232 converters >> >> >> >>> That's a good point. The older Prolific drivers had a nasty >>> >> habit of >> >>> crashing my laptop (Win XP would not wake up) if I put it in >>> hibernation with the adapter plugged into the USB socket. The new >>> drivers mostly fix the problem. I may occasionaly have to >>> >> unplug and >> >>> replug the device after waking up, but the OS no longer crashes. >>> >> The SIRF GPS units use the Prolific chips. >> >> I have had mixed results with them on Linux. >> >> They don't work like I expect when I try to use several of >> them on a high speed hub. The Prolific chip wants some >> guaranteed bandwidth and Linux has troubles allocating it. I >> thought I found a kernel option to get around that, >> CONFIG_USB_EHCI_TT_NEWSCHED, but I tried to clean things up >> last night and mumble. I guess it helps but not as much as I >> though. Mumble. It may be the hub-hub case that doesn't >> work. I've got a 7 port hub which is really >> 2 4 port hubs chained. >> >> I haven't noticed any troubles without the hub. I'm not >> doing anything fancy. >> >> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > -- Ing. Jeroen Bastemeijer Delft University of Technology Department of Electrical Engineering Electronic Instrumentation Laboratory Mekelweg 4, Room 13.090 2628 CD Delft The Netherlands Phone: +31.15.27.86542 Fax: +31.15.27.85755 E-mail: [EMAIL PROTECTED] GPS: Lat N52.00002 Lon E4.37157 Alt 46.2m _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.