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Re: [Wlug] USB hangs system - requires reboot

by John Stoffel

Andy> I just installed SuSE 7.2 Professional and upgraded to the 2.4.6 Andy> kernel (SMP). For the very first time, I'm attempting to enable Andy> the USB controller on my motherboard to talk to my Epson 870 Andy> printer (which has both parallel and USB interfaces). The Andy> onboard controller is an 82371AB. What's you're motherboard? What kind of CPUs/memory do you have? Andy> I looked and noticed the following kernel modules loaded: Andy> usbcore Andy> printer Andy> usb-uhci This looks ok, but you might want to use the usb-ohci module instead. There are some issues. Andy> I think this is correct. I've enabled verbose debugging Andy> messages in the kernel. I looked at /var/log/messages, and it Andy> is detecting my printer. Also, I ran a program called usbview Andy> and saw the printer there as well. OK so far. This output would help us here. Andy> I get about 1 line of output and then my entire system hangs (it Andy> completely ignores any keyboard input, mouse movements don't Andy> cause cursor movement, and the machine is unaccessible from the Andy> network). I end up reaching for the reset button and waiting Andy> forever for my disks to fsck (yes, Tim K. I'm seriously Andy> considering Reiser fs). :-) Do you have MagicSysReq Key enabled in your kernel? I'd suggest you enable that (and make sure SUSE doesn't disable it like redhat does) and when the system locks, you can try and get a traceback to see what's up. Andy> I'm not sure I know how to go about debugging this...any Andy> suggestions? Oh, by the way, I did insure that there were no Andy> parallel port modules in place that might somehow interfere. That shouldn't matter, esp if you don't have your printer hooked up to both interfaces at the same time. As for your fsck woes, I'd get the latest version of ext3 instead, since you can enable/disable it without having to do a dump/restore conversion like you would for reiserfs. It's not in 2.4.6 by default, but it's easy to patch your kernel with it. Here's the URL: http://www.uow.edu.au/~andrewm/linux/ext3/ I'm running 2.4.6 with ext3 on SMP and it seems to work pretty well so far. No real stress testing yet tough. John

July 16, 2001

Re: [Wlug] What is shmfs?

by ccb＠acm.org

Hi Andy - The SystemV shared memory subsystem is now available as a filesystem under Linux. Fire up your choice of kernel config editor tool and check out the help for "File Systems/Virtual Memory file system support" ccb -- Charles C. Bennett, Jr. VA LiNUX Systems Systems Engineer, Northeast US 25 Burlington Mall Rd., Suite 300 +1 617 543-6513 Burlington, MA 01803-4145 ccb(a)valinux.com www.valinux.com

July 16, 2001

Re: [Wlug] What is shmfs?

by Steve Freitag

Well, here's what I know about it... shmfs = "Shared Memory File System" - contents sit in RAM and swap partitions - used to implement POSIX.4 shared memory support. Here is an early announce of it: http://lwn.net/1998/0409/a/shmfs.html Code can be found here: http://www.users.qwest.net/~ebiederman/files/ ----- Original Message ----- From: "Andy Stewart" <andystewart(a)mediaone.net> To: <wlug(a)mail.wlug.org> Sent: Sunday, July 15, 2001 6:40 PM Subject: [Wlug] What is shmfs? > > HI gang, > > After upgrading to a 2.4 kernel, I now see a mounted device thus: > > Filesystem 1k-blocks Used Available Use% Mounted on > shmfs 76220 0 76220 0% /dev/shm > > I can't find anything written that says what this is. I seem to be able > to put files there. Any thoughts? > > Thanks, > > Andy > -- > Andy Stewart > Founder > Worcester Linux Users' Group > Worcester, MA, USA > http://www.wlug.org > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

July 16, 2001

New IIS Exploit??

by Doctor Orbitz

Hey, I have recently been gettign a BUTTLOAD of hits on my web server that look like this: "GET /default.ida?NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN%u9090%u6858%ucbd3%u7801%u9090%u6858%ucbd3%u7801%u9090%u6858%ucbd3%u7801%u9090%u9090%u8190%u00c3%u0003%u8b00%u531b%u53ff%u0078%u0000%u00=a HTTP/1.0" I've just recntly had a ton of requests liek that, is this a new exploit or what?? Orbitz

July 15, 2001

What is shmfs?

by Andy Stewart

HI gang, After upgrading to a 2.4 kernel, I now see a mounted device thus: Filesystem 1k-blocks Used Available Use% Mounted on shmfs 76220 0 76220 0% /dev/shm I can't find anything written that says what this is. I seem to be able to put files there. Any thoughts? Thanks, Andy -- Andy Stewart Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org

July 15, 2001

Re: [Wlug] USB hangs system - requires reboot

by ccb＠acm.org

Hi Andy - Try the VALinux beta 2.4.5 kernel: ftp://ftp.valinux.com/pub/software/kernel/beta USB hasn't been a priority for VA but one of the usb-linux developers is inside the VA kernel group and tends to plug in a bunch of stuff with each of the kernels. Ain't tried it. Let me know what you think. ccb -- Charles C. Bennett, Jr. VA LiNUX Systems Systems Engineer, Northeast US 25 Burlington Mall Rd., Suite 300 +1 617 543-6513 Burlington, MA 01803-4145 ccb(a)valinux.com www.valinux.com

July 15, 2001

Re: [Wlug] USB hangs system - requires reboot

by Andy Stewart

HI Charlie et al, I completely blew away my modules directory and rebuilt my kernel to use uniprocessor (I never did like those canned kernels and canned modules - call me old fashioned but they generally cause me grief). Now, USB works like a champ! I've just printed several docs using CUPS and gimp-print - sweet! Bummer that this doesn't work under SMP...is this a known problem? I doubt my computer is *that* unique. I really would like my SMP back. :-) I did notice one thing - eth0 and usb-uhci are sharing an interrupt. The motherboard magically assigns this and I believe that I can't override it. I wonder if this is causing the problem in SMP mode. I guess I'll keep my eyes open for kernel rev 2.4.7. Later, and thanks, Andy On Saturday 14 July 2001 23:43, ccb(a)acm.org wrote: > Hi Andy - > > Long time no see. > > 2 things: > > That kernel comes with EXT3 already integrated in the source. Once > you have an ext3 kernel you can enable it by changing fstab. Disable > it by changing fstab. The on-disk structure is the same. > > Start debugging by booting with the second CPU turned off. You > could be locking on MP bug. Used to happen with me and my HP720 > OfficeJet until they get their MP act together. > > > ccb > > -- > Charles C. Bennett, Jr. VA LiNUX Systems > Systems Engineer, Northeast US 25 Burlington Mall Rd., Suite 300 > +1 617 543-6513 Burlington, MA 01803-4145 > ccb(a)valinux.com www.valinux.com > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug -- Andy Stewart Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org

July 15, 2001

Re: [Wlug] USB hangs system - requires reboot

by ccb＠acm.org

Hi Andy - Long time no see. 2 things: That kernel comes with EXT3 already integrated in the source. Once you have an ext3 kernel you can enable it by changing fstab. Disable it by changing fstab. The on-disk structure is the same. Start debugging by booting with the second CPU turned off. You could be locking on MP bug. Used to happen with me and my HP720 OfficeJet until they get their MP act together. ccb -- Charles C. Bennett, Jr. VA LiNUX Systems Systems Engineer, Northeast US 25 Burlington Mall Rd., Suite 300 +1 617 543-6513 Burlington, MA 01803-4145 ccb(a)valinux.com www.valinux.com

July 15, 2001

Re: [Wlug] Any complaints about Charter cable modems?

by Michael Long

It is my understanding that a crossover cable is needed when connecting two similar devices such as 2 switches or 2 routers. Maybe your cable modem has some builtin router functionality?! On Saturday 14 July 2001 08:49, you wrote: > Aaron Haviland wrote: > > doug waud said: > > > A trip to > > > the website of the cable modem manufacturer indicated a related model > > > liked a crossover ethernet cable between the modem and a router. I > > > tried that and the system has been running fine without any > > > intervention on my part since then. > > > > After they left, I rewired a bit. But I got away with a plain cable from > > the modem to a hub, not a crossover. > > I was not implying a crossover cable was a general solution, just > that it was one more thing to try when desperate :-) > Frankly I was surprised it worked and still am not sure why :-) > > doug > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

July 15, 2001

USB hangs system - requires reboot

by Andy Stewart

HI gang, I just installed SuSE 7.2 Professional and upgraded to the 2.4.6 kernel (SMP). For the very first time, I'm attempting to enable the USB controller on my motherboard to talk to my Epson 870 printer (which has both parallel and USB interfaces). The onboard controller is an 82371AB. I looked and noticed the following kernel modules loaded: usbcore printer usb-uhci I think this is correct. I've enabled verbose debugging messages in the kernel. I looked at /var/log/messages, and it is detecting my printer. Also, I ran a program called usbview and saw the printer there as well. OK so far. I tried: cat some_file > /dev/usblp0 I get about 1 line of output and then my entire system hangs (it completely ignores any keyboard input, mouse movements don't cause cursor movement, and the machine is unaccessible from the network). I end up reaching for the reset button and waiting forever for my disks to fsck (yes, Tim K. I'm seriously considering Reiser fs). :-) I'm not sure I know how to go about debugging this...any suggestions? Oh, by the way, I did insure that there were no parallel port modules in place that might somehow interfere. Thanks in advance, Andy -- Andy Stewart Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org

July 15, 2001