On Tue, 2 Nov 2004, kurt emmerich wrote: > I hope this is the right place to ask - if not I apologize- would someone please point me in the right direction? > > I'm running Fedora 1 on a 400MHz Pentium 2. Runs great, no problem, except when using the KDE or GNOME desktop. When receiving serial data ( /dev/ttyS0) 115200,8,n,1, I'm losing characters. Looks to me like the serial receive interrupt is getting 'stalled'. This occurs at bauds as low as 19200 ( I dont recall if I tried lower than that) and gets must worse as I drag windows aroung the screen with the mouse. > However, when I open a text console ( ctrl-alt-f1) and run minicom from there, I can successfully receive well over 150M of data with zero errors even at 115K baud. Hardware handshaking is enabled and asserted. > > Might I ask for feedback on this? Has anyone else seen this? Any opinions on why this is occurring?? > > Thanks, > Regards, > Todd Which graphics card and driver? Which AGP chipset (ie. LX, BX, etc...)? Your XFree86 driver isn't using a framebuffer device is it? Is the serial port sharing an interrupt with something else? I suspect a shared interrupt or a "PCI retry" problem. PCI retries are usually caused by the graphics driver and are particularly a problem on Intel LX chipsets. Historically, this has caused problems with sound cards, but I suppose it could effect serial as well. Mark. _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
