Copying files to USB device stalls / slow performance
Bug #206453 reported by
Zuo Pin Jie
This bug report is a duplicate of:
Bug #197762: [NO MORE COMMENTS] vague problems with USB file transfers.
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This bug affects 2 people
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Ubuntu |
New
|
Undecided
|
Unassigned | ||
Bug Description
I'm using Dolphin to copy files to my external thumbdrive. I do this regularly with files > 600mb. When Vmware is running the copy will stall and be sporatic. I will get periods of speeds up to 8Mb/s then it will slow down and stall. I am also sharing a different USB drive within Vmware. I have removed any USB hubs, etc and tried different USB ports. This behavior did not exist on the same hardware running OpenSuse. It appears to also occur when I use the console to copy using cp.
When running without any issues, I get about 20 MB/s speed.
Running kernel 2.6.24-12 on Hardy / Kubuntu 64.
Revision history for this message
| Zuo Pin Jie (ubuntu-zieglerzone) wrote | #1 |
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I have verified that without Vmware running I get copy speeds of about 8Mb/s. With Vmware running I get the above behaviour. During the stall, top shows I have plenty of idle process and iostat shows IO use is normal.