On 12/20/05, Alan Stern <[EMAIL PROTECTED]> wrote: > Is it possible to run your code (or a slightly hacked version of it) with > the video driver not loaded? You could just write dummy data (zeros) to > the disk.
Yes. Actually, I have built in a software encoder simulator who is just producing data streaming, the simulator is controlled by a MACRO. I have run this simulator version program many times "in my computer"(because lack of real hardware at that time, and usb is 1.1), no problem found. I plan to run this code in real hardware. It needs many time to validate. I'm doing another test now. In this test, the data is saved in a 'local' IDE disk rather than a USB-IDE disk. If no error occurs in this test, I think there may be a problem in USB side or a bug in cooperating between USB and vedio driver? Otherwise, the bug likely lies in video driver or the application. The testing will last 1 to 2 days. > > I have ever seen "reset high speed USB device" message in the output ... > > Those resets could be symptoms of a problem with the USB communication. > They are typically caused by noise in the cable; perhaps replacing the USB > cable would help. I'll check the cable. > > ... > > usb 2-1: reset high speed USB device using ehci_hcd and address 2 > > > > but sometimes, there is no "reset" message and my application still > > hangs, and so dose fdisk -l and df -l. > > > > Another 'better' case: fdisk -l can see /dev/sda1, but df -l shows no > > /dev/sda1, and the mount point /home/ can be accessed. Anyone saw > > this? > > I wonder if this could be caused by a bug in the mpeg4k driver. That's > why I suggested running a test without loading the driver. Understand, and thanks for your suggestion. If I saw "fdisk -l" or "df -l" hang, can I conclude that some file system data structs have been destroyed? likely I should ask this question in file system mailing list. :) -- Best Regards, Fisher ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_idv37&alloc_id865&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
