Description of problem: I have an USB scanner Epson perfection 2480 photo. Until FC6 was flawless, but after the F7 upgrade, the scanimage tool forced a warming up before every run. Not an blocking bug, but the scan time is more than doubled. After some digging, I've found a reference to the "usb_reset" patch, and a version of sane-backends rebuilt _without_ the patch runs flawlessy again. Version-Release number of selected component (if applicable): For sure from sane-backends-1.0.18-6.fc7 to sane-backends-1.0.18-17.fc7 (the development one) included. How reproducible: Every time. Steps to Reproduce: 1. do many runs of "scanimage -n" 2. 3. Actual results: Before any run, the system says "[snapscan] Scanner warming up - waiting 8 seconds." Expected results: A warming up before the first run only. Additional info: I'm sorry, my english is buggy.
Search via Google reveals other instances of this problem. See http://www.google.ca/linux?restrict=linux&q=%22%5Bsnapscan%5D%22+%22warming+up%22 https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/93515 Apparently the issue is really with libusb. One workaround suggestion was to add 'scanbuttond' to the mix (which has a slew troubles of its own - see bug 383131). That apparently did have a salutory effect on F7 but made the situation much worse for F8 (where 'snapscan' looks like an improved thing on its own). 'scanbuttond' was used on an installation in question only for that side-effect and not really to service any button events. All the above is a "seconhand knowledge". I do not have a scanner using 'snapscan' driver. I was just trying to help my friend which, unfortunately, interacts with computers only in "just a naive user" mode.
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With Fedora 10 version of sane-backends (sane-backends-1.0.19-12.fc10) the problem (and the patch) disappeared.