(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Wed, 9 Dec 2009 23:04:21 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=14778 > > Summary: USB (intel chipset) with external mass storage > extremely slow or blocking > Product: IO/Storage > Version: 2.5 > Kernel Version: 2.6.31-16-generic (Ubuntu 9.10) > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: Other > AssignedTo: io_other@xxxxxxxxxxxxxxxxxxxx > ReportedBy: hadmut@xxxxxxxxxx > Regression: No > > > Hi, > > for several months and still with the latest Ubuntu version I have severe > trouble with my Toshiba Notebook (and found in forums that others have the same > problem): > > When writing to USB-connected flash memory (USB-Stick/pendrive or camera flash > cards like compact flash oder SD connected with a USB card reader), the process > of writing gets quickly extremely slow and finally blocks completely. I see the > problem on another notebook with intel chipset as well, but not with my > computers having ATI controllers. > > Most often, there is no error message at all in the logs or dmesg. But > sometimes there's a backtrace. > > See my bug report for Ubuntu under > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/493199 > > to find a detailed system and hardware description and one of theses > backtraces. > > > I guess that there is some timing or interrupt problem which finally results in > a deadlock. > I'll reassign this to USB. The launchpad.net bug report is horridly wordwrapped. It looks like requests got lost - perhaps IO completion interrupts didn't happen, or didn't signal completion. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
