First of all, sorry for the lag of my messages. My personal problems didn't end as soon as I expected. I now think that I can send the needed information much faster. Sorry for this.
On Nov 21 2003, Alan Stern wrote: > On Thu, 20 Nov 2003, Rogério Brito wrote: > > OTOH, I compiled a 2.6.0-test9 kernel for my old notebook (a Compaq > > Armada V300) and for this notebook, the drive works. The appropriate > > dmesgs are also included at <http://www.ime.usp.br/~rbrito/usb/>. > > Looking at your dmesg ouput, the important parts are at the end. For your > desktop system it said: > > hub 1-1:1.0: enabling power on all ports > hub 1-1:1.0: transfer --> -75 > usb 1-1: control timeout on ep0in > > For your notebook, it said: > > hub 1-1:1.0: enabling power on all ports > hub 1-1:1.0: port 1, status 101, change 1, 12 Mb/s > hub 1-1:1.0: debounce: port 1: delay 100ms stable 4 status 0x101 > hub 1-1:1.0: new USB device on port 1, assigned address 3 > hub 1-1:1.0: transfer --> -75 > > and went on from there. Right. > The -75 error code means that the internal hub isn't behaving > correctly. It's sending back replies that are longer than they are > supposed to be. And is it possible that those replies are what causes khubd to hang in D state? > But even apart from that, there's still something else wrong. The fact > that the problems began right after the power was turned on to the > internal hub's ports is suspicious. It suggests that the power level > could be a problem. Maybe your desktop computer isn't supplying enough > power over its USB connection and your notebook is; that would explain > everything. Ok. I understand the issue. But would there be any explanation to the fact that it may work under Windows and not under Linux? Also, I am not really sure that the drive always works under Linux with my notebook. I can test that a bit further (I just tested a bit more before sending this e-mail out and it seems that the notebook always recognizes the drive). > If you have an external hub that uses an external power supply -- one > that you have to plug in to a wall socket -- that would make a good > test. Attach the external hub to your desktop computer and then > attach the drive to the hub. Since the hub gets power from the wall > socket, it ought to provide sufficient current for the drive to > operate. Well, I don't have one external hub, which means that chasing the bug may be a little bit more involved. The only USB devices that I have are the USB drive, an HP printer and a keyboard and a mouse. The only device with which I had problems under kernel 2.4.x was the drive, which was the reason I tried a 2.6.x kernel (expecting it to work). > Another helpful thing you could do is to post the contents of > /proc/bus/usb/devices on your notebook while the drive is plugged in > and working. That would indicate if the drive is bus-powered and how > much electricity it needs. Well, by luck, I just got the drive working in this boot on my desktop and I saved a dmesg of everything and the contents of the cited file (also from my desktop). I put both files on my hompeage at: <http://www.ime.usp.br/~rbrito/usb/>. I also put the contents of /proc/bus/usb/devices from my notebook there. I am compiling a kernel 2.6.0-test10 right now with usb-storage excessive debugging disabled (to avoig spamming my dmesg outputs with information that isn't useful), now that we know that the problem seems to occur before usb-storage enters the game. If you would like to know what happens under any specific circumstance, please let me know. Thank you so much for your attention, Rogério. -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Rogério Brito - [EMAIL PROTECTED] - http://www.ime.usp.br/~rbrito =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
