Logitech B100 mice move the cursor too fast |
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Issue descriptionChrome Version: 71.0.3578.85, 72.0.3623.3 dev OS: Chrome OS 11151.52.0 dev-channel samus test, 11307.0.0 dev-channel eve What steps will reproduce the problem? (1) Connect a Logitech B100 mouse. (See note below about mouse selection.) (2) Move the mouse around a bit, and maybe compare it to another mouse. (I compared it with a Logitech Anywhere MX.) What is the expected result? The cursor movement produced by moving each mouse the same distance should be roughly the same. What happens instead? The B100 is markedly faster than the other mouse, to the point of being difficult to use at normal speed settings. --- This issue was first reported on the Google chromeos-discuss list [0], where users were having trouble selecting small UI elements due to the speed of the B100 mouse. I bought one of these mice and reproduced the bug. We already have an entry in 20-mouse.conf setting the B100's CPI to 580, but when I measured the DPI of the mouse I bought I found it to be around 1110. Another B100 from a couple of years ago (with the same model number but a different part code) was around 1070 DPI. Logitech appears to have reused the same USB product ID for at least three different versions of this mouse, meaning that the CPI value is out of date. [0]: http://g/chromeos-discuss/23IH5HDuh24 (Googlers only, sorry.)
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Jan 18
(5 days ago)
We've been unable to locate one of the old 580 DPI mice. The part codes of the ones we did find are 810-002149 (for the ~1070 DPI one, which identifies as an M90/M100 in its USB product string) and 810-003656 (for ~1110 DPI, which identifies as an M105).
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Jan 19
(4 days ago)
The following revision refers to this bug: https://chromium.googlesource.com/chromiumos/platform/xorg-conf/+/c63a4457a7b3d28081dcb1de276928d49ded130a commit c63a4457a7b3d28081dcb1de276928d49ded130a Author: Harry Cutts <hcutts@chromium.org> Date: Sat Jan 19 04:05:27 2019 20-mouse.conf: Remove CPI value for "HP branded Logitech" mouse Logitech appears to have re-issued B100 mice with higher-DPI sensors, which move the cursor much too fast due to this old, low CPI value. These have been available for a while (one that we found was at least 2 years old), and so are likely more common, so let's remove this special case so that they work well. BUG=chromium:923195 TEST=Connected a B100 to a Samus, checked that it could be moved precisely and compared its speed to a Logitech Anywhere MX. Change-Id: I49bb5a920a066bd35a1b5c3f4a4cefefb113bf44 Reviewed-on: https://chromium-review.googlesource.com/1419135 Commit-Ready: Harry Cutts <hcutts@chromium.org> Tested-by: Harry Cutts <hcutts@chromium.org> Reviewed-by: Sean O'Brien <seobrien@chromium.org> [modify] https://crrev.com/c63a4457a7b3d28081dcb1de276928d49ded130a/20-mouse.conf |
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Comment 1 by hcutts@chromium.org
, Jan 18 (5 days ago)