Bug 23192
| Summary: | need to disable USB LPM on new macbook air | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Brian Tarricone (bjt23) |
| Component: | USB | Assignee: | Greg Kroah-Hartman (greg) |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | ||
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | Subsystem: | ||
| Regression: | No | Bisected commit-id: | |
| Attachments: |
dmesg output during failure
patch to disable LPM on nvidia MCP89 |
||
Created attachment 37422 [details]
patch to disable LPM on nvidia MCP89
Argh, it looks like my bugzilla search skills failed; #21182 seems to have beaten me to the punch. Though the patch there looks incorrect: it disables LPM for the OHCI controller's PCI id (0x0d9c) and not the EHCI controller (0x0d9d). |
Created attachment 37412 [details] dmesg output during failure I'm getting USB protocol errors when attaching devices (in my case USB flash drives and CDC ethernet devices). I found that kernel .34 was working, but .37-rc2 was not. Bisected to find that the commit that added LPM support (48f24970144479c29b8cee6d2e1dbedf6dcf9cfb) was at fault, so I disabled LPM and that did the trick. Not sure if there's a better way to fix this than to just disable LPM outright; if you have any ideas to try I'd be happy to give it a look. I'll attach dmesg log and the patch.