Opened 11 years ago
Last modified 3 years ago
#9936 new bug
EHCI: USB hot-plugging fails, error 0x00088141
| Reported by: | jessicah | Owned by: | mmlr |
|---|---|---|---|
| Priority: | normal | Milestone: | R1 |
| Component: | Drivers/USB/EHCI | Version: | R1/Development |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Platform: | All |
Description
Sometimes when hot-plugging my USB keyboard/mouse, the USB devices stop working. E.g. my mouse doesn't light up, or the blue light on my wireless keyboard's dongle doesn't go out (it seems to stay on until the device is initialised from what I've observed). Happens on hrev45982.
Attachments (4)
Change History (7)
by , 11 years ago
| Attachment: | clipped syslog added |
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by , 11 years ago
| Attachment: | listdev.txt added |
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by , 11 years ago
| Attachment: | listusb.txt added |
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comment:1 by , 11 years ago
It would be quite a coincidence but, could this be related to the problem described here https://plus.google.com/u/0/116960357493251979546/posts/RZpndv4BCCD ??
I see a few snooze(10000) calls in the ehci and uchi add-ons code.
If you can't resolve the link, it describes a long time issue in Linux resulting from a misinterpretation of the USB 2 spec:
section 7.1.7.7, the spec states "The USB System Software must provide a 10 ms resume recovery time (TRSMRCY) during which it will not attempt to access any device connected to the affected (just-activated) bus segment."
Apparently 10ms is the minimum time to wait before you are allowed to check whether or not you can access a device connected to the bus, waiting 10ms doesn't guarantee that the device is available.
comment:2 by , 6 years ago
| Component: | Drivers/USB → Drivers/USB/EHCI |
|---|---|
| Summary: | USB hot-plugging fails → EHCI: USB hot-plugging fails, error 0x00088141 |
syslog