add uhci_hcd bug to README.md
[evhz] / README.md
1 # evhz
2
3 Display the current mouse refresh rate under linux with evdev
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5 For information about polling rate, see https://wiki.archlinux.org/index.php/Mouse_Polling_Rate
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7 The program is just evhz.c. Compile and run:
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9 gcc -o evhz evhz.c
10 sudo ./evhz
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12 Nonverbose mode = -n
13
14 There exists a kernel bug for USB ports which use the uhci_hcd driver,
15 where a 1000 hz mouse will only read at 500hz, causing jittering:
16 https://bugzilla.kernel.org/show_bug.cgi?id=60586. A workaround is to
17 use USB ports that use the ehci-pci driver.
18
19 Maintainer: Ian Kelling <ian@iankelling.org>
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21 Bugs, patches, requests, feedback are welcome.
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23 Last tested 7/2016 on Debian testing. Still working great after several
24 years.