On Thursday 14 February 2008, Krzysztof Halasa wrote: >Gene Heskett <[EMAIL PROTECTED]> writes: >> Apparently they do not Alan, the pl2303 in particular is a problem child, >> throwing several lost com errors a day when doing nothing more strenuous >> than talking to my belkin UPS from apcupsd, very small packets there, 20 >> bytes I believe at several second intervals. > >Is your UPS using "modern" hardware handshaking (CTS = PC can send, >with RTS practically always asserted)? Or perhaps the "old", >"half-duplex" V.24-style (RTS asserted before TX and then waiting for >CTS)? > >Are you sure it uses hw handshaking at all? Most (all?) UPSes I used >had only TxD and RxD (for RS-232).
ATM, its plugged into a USB port, but for some reason was not recognized at the last bootup. And I just installed the rpm for a newer version of apcupsd when I found apcupsd was logging an error and exiting about 2 seconds after being started by the 'service' utility. So I'm a bit puzzled. From the dmesg at boot time there is no mention of it being found, from the current dmesg, after unplugging the USB cable from the back of it and replugging it about a second later, and got this: [180077.652645] usb 1-1.1: USB disconnect, address 6 [180080.387154] usb 1-1.1: new low speed USB device using ehci_hcd and address 11 [180080.586706] usb 1-1.1: configuration #1 chosen from 1 choice [180081.339062] hiddev97hidraw3: USB HID v1.11 Device [Belkin Belkin UPS] on usb-0000:00:02.2-1.1 As to why it wasn't found at bootup, call me bumfuzzled. Uptime is about 2d 3h and I wasn't aware it wasn't running until I wanted to see if anything was different about how it handled my belkin, which is not well, but it does take care of the graceful shutdown. I just found this: [EMAIL PROTECTED] ~]# dmesg |grep -A2 'address 6' [ 30.990194] usb 1-1.1: new low speed USB device using ehci_hcd and address 6 [ 31.183832] usb 1-1.1: configuration #1 chosen from 1 choice [ 31.190504] usb 1-1.1: can't set config #1, error -32 -- [180077.652645] usb 1-1.1: USB disconnect, address 6 [180080.387154] usb 1-1.1: new low speed USB device using ehci_hcd and address 11 [180080.586706] usb 1-1.1: configuration #1 chosen from 1 choice So something wasn't available at bootup. And I'm still puzzled... -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The most important early product on the way to developing a good product is an imperfect version. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
