As nobody answered I'll answer:
I wrote: > Is it a general problem to use X 4.x.x together with RTLinux? > I saw there was some discussion about the accelerated drivers some time > ago. I decided: YES, it is (but what in some years when X3.3.x died)! > My problem: > > If I start RTLinux from X (xterm) and my module everything is okay > (except some jitter - that's maybe from direct irq handling of X - as > the discussion showed ...). okay, it's maybe the pci_retry function that's part of the PCI2.1 spec. Can one disable this feature? I heard it's only implemented in Intel440BX and later chipsets ... > > When the whole thing runs and I shutdown X -> the machine hangs (also my > rtl-module) -> reset -> fsck -> some files are lost -> ... > I'm now using XFree 3.3.6 (recent Debian packages and a old Redhat 6.2). I have definetely less jitter than before. But still, when I do some crazy things with my windows -> jitter (not with Redhat). A X4.x.x without hardware acceleration will cause more jitter. Letting X crash (or whatever) doesn't do any harm now to RT (except some jitter with the Debian version). A good test for the realtime capability is the resizing of the search panel in mozilla ... Funny is that a 2.2.19 RTL3.1 kernel will reduce the jitter. 2.4.4 RTL3.1 will give me more jitter. And a SMP kernel will give me even more jitter. All together means: Any new Linux program (X, kernel, ...) and a video card with the pci_retry feature can't provide me realtime. Redhat6.2 with RTL3, 2.2.18 seems to be 'realtime' (but it crashes once in a while and is a old uniprocessor configuration (on a SMP box) ...) If anyone has a comment to one or all these results: post it ... Stefan b.t.w.: posting is now faster: 9 hours ... -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
