On Tue, Feb 27, 2007 at 01:56:59PM -0800, David Brownell wrote: > You could try updating /etc/modprobe.conf with "options ov511 cams=2"
cams=2 fixed it! So I've a real clean workaround now. And before doing any work on ov511 at this point we'd need to know what's the status of the driver... (i.e. most uptodate version) > (or 3, or 5) to make its default guess be less unfriendly. Or maybe > stick that device on a high speed hub ... the transaction translator > support is pretty messy, but I'd expect there's some way to wire things > up to make it behave. (Getting lowspeed devices off the device you > share with that camera would probably help a lot.) There are 4 ports in the back and 2 in the front. It was in one on the back, now it's on the front, it doesn't seem to make difference because internally they seem all connected to the same chip. > ... as expected. For various reasons, most folk haven't run into > the bandwidth limitations with pure USB 1.1 systems. In your case, > the issue is that recent NVidia chipsets have shaved costs somewhat > (including power usage) by moving from two OHCI controllers (with > just a few ports each) to one (with eight or more ports). Power usage is quite good, with a 65W EE X2 4600 I get 136W total with average load. > Again, that's the job of ov511. It requested the bandwidth, it didn't > get it, then it behaved rather poorly. I see now. > That's one way to look at it. How would you describe overcommitting > swapspace? :) But we exactly allow overcommitting swapspace for similar reasons: not all apps behave sanely. They often allocate ram they never map and so effectively the reserved ram is just "virtual" and zerocost, just like the bandwidth reserved by ov511. while debugging a trouble with the oom killer, I just noticed mysqld was taking 500M of virtual address space despite less than 20M of ram are allocated (taking rss into account besides total_vm seems to improve it). thanks for the help in finding the real problem! ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
