Bug 52519
Summary: | ppa driver conflicts with usb mouse | ||
---|---|---|---|
Product: | [Retired] Red Hat Linux | Reporter: | Leonid Kanter <leon> |
Component: | kernel | Assignee: | Pete Zaitcev <zaitcev> |
Status: | CLOSED NOTABUG | QA Contact: | Brock Organ <borgan> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 7.3 | ||
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | i386 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2001-08-24 17:42:57 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Leonid Kanter
2001-08-24 16:35:38 UTC
The root cause seems the poor shielding between parallel and USB. In fact, the message is right there hub.c: already running port 2 disabled by hub (EMI?), re-enabling... EMI stands for Electro-Magnetic Interference. The following is bothersome though: "When I finished working with zip, I removed ppa module, reloaded usb-uhci and got mouse working again." The mouse must recover on unplug-replug automatically and there must be no need to reload usb-uhci. If usb-uhci does not recover, that might be a bug. With the hardware SO crappy as the user's, nobody can give a 100% guarantee, but I am willing to look into it if usb-uhci does not recover. How is Windows coping with it? I am curious... Of course, no useful messages about EMI may be forthcoming, but still. Perhaps its driver for ZIP knows how to reduce EMI with clever timing. I tried one more time and mouse died again after copying 20Mb file from zip (smaller amount of data may not cause mouse death, just non-smooth movement). Yes, it's possible to revive it by re-plugging mouse cord even without removing ppa driver and unmounting zip. As for Windows, I have w2k installed on other partition but there is no iomega driver installed. If I found driver, I'll try and report. I think it's pure EMI. |