On Mon, 10 Jan 2005, Kyle Rose wrote: > > I saw this with an early version of the HD3000 driver. Have not > > seen it since v1.3, however. > > On HD-3000 or 2000? I haven't tried the 3000 card yet: it may react > better. That's something to try.
My backend: DFI PRO875B motherboard 3.0 GHz HT P4 cpu 1GB RAM Three HD-3000 cards Fedora Core 2 with stock 2.6.7 kernel (custom configured) Myth CVS as of Jan 8th. I can record three shows simultaneously, while watching a fourth, with absolutely no data loss or coruption. > > > Does it happen with ALL of your stations? > > Well, it happens at least with ABC, FOX and PBS-HD. Haven't tried the > others, but ABC and PBS-HD have very high signal strength (>90%) and > FOX has sufficient signal (>75%). That should be fine. > > What kernel are you running? I have custom configured 2.6.7 and > > 2.6.9 kernels. The 2.6.7 kernel works better. That may be because > > I have "pci=noapic" for the 2.6.7 kernel, and not for the 2.6.9 > > kernel, however. > > I am using 2.6.9 with noapic nolapic (seems this behavior isn't quite > as bad with APIC support off) and with acpi on (some things, notably > on-board USB, seem not to work with acpi off). 2.6.9 does work for me, so that is probably not the problem. > > Jack (at pcHDTV.com) suggested turning *off* preemptive scheduling, > > which I have done in both. > > I had CONFIG_PREEMPT off initially; didn't notice much difference when > I turned it on, so maybe I'll shut it off again. > > Given how intermittently this happens (once every few seconds) I think > I'm right on the cusp of being able to handle it with the current > system. Would suck to have to get a faster processor just to mitigate > high interrupt latencies when an 1800+ is overkill for the work this > machine needs to do 99% of the time. If you think it is a PCI latency issue, search the Myth users archive for subject "PCI/AGP Latency". http://www-106.ibm.com/developerworks/linux/library/l-hw2.html John
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