Am So, 2003-08-31 um 18.28 schrieb Jon Burgess: > Andreas Vierengel wrote: > > > > hi, > > your patch doesn't work for me (P4-Celeron 2.4GHz, i845GE Chipset). > > sorry ! > > However I tested all combinations of burst and treshold settings for > > Video-DMA-Channel #3 in PCI_BT_V1. Results are below. > > However I actually do get stream corruption on my Nexus-s as well, but > > they are very rare. So I applied the same burst/treshold settings to my > > nexus-s as well. Things are now perfect on both cards, but as Jon said: > > "this only indirectly avoids the problem and doesn't actually fix it." > > [ Results from a good set of test deleted to save space ] > > It is good that you can get it to work well. You results imply that > increasing the threshold does seem to make it work better for you. > > I might have been simplifying the "burst size" issue a bit too much. > There may well be issues with doing big bursts on the bus. > > Do you use the built video of the 845G?
yes. > > I would be interested to know how the shared memory of the 845G video > effects the PCI bus. The PCI bus must get interrupted frequently as the > video chip refills the display FIFO. the vga-chip seems to be on bus 0. only onboard ethernet is on bus 1 together with all external pci-cards. here is a lspci output. I don't know very much about today's motherboard internals, but are these 2 busses are physically seperate ? 00:00.0 Host bridge: Intel Corp.: Unknown device 2560 (rev 03) 00:02.0 VGA compatible controller: Intel Corp.: Unknown device 2562 (rev 03) 00:1e.0 PCI bridge: Intel Corp. 82820 820 (Camino 2) Chipset PCI (rev 82) 00:1f.0 ISA bridge: Intel Corp.: Unknown device 24c0 (rev 02) 00:1f.1 IDE interface: Intel Corp.: Unknown device 24cb (rev 02) 00:1f.3 SMBus: Intel Corp.: Unknown device 24c3 (rev 02) 01:00.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01) 01:04.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01) 01:08.0 Ethernet controller: Intel Corp.: Unknown device 103a (rev 82) > A PCI bus analyzer would be needed to really understand what is going on. > > Jon > that would be really cool and certainly a nice addon to strace, tcpdump, etc :) --Andi -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
