Touchscreen palm rejection not working properly
Reported by
0spor...@gmail.com,
Jan 27 2017
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Issue descriptionUserAgent: Mozilla/5.0 (X11; CrOS x86_64 9000.76.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.79 Safari/537.36 Platform: 9000.76.0 (Official Build) beta-channel cyan Steps to reproduce the problem: 1. Place palm or other touchscreen-reactive material on touchscreen 2. Use a stylus or finger elsewhere on the screen What is the expected behavior? OS "sees" palm or other large touchscreen-reactive surface and counts it as not a gesture. Using fingers or capacitive stylus elsewhere is recognised as a gesture during this. What went wrong? Touchscreen becomes unresponsive to everything, turning the Projection Touch HUD on shows that it doesn't recognise anything either. Taking palm or similar off of the screen restores touchscreen capability instantly. See video for example. Did this work before? N/A Chrome version: 56.0.2924.79 Channel: beta OS Version: 9000.76.0 Flash Version: 24.0.0.194 #CBC-RS/TC-watchlist
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Feb 8 2017
Has this been looked into since original issue? It's really quite an problem when drawing, especially on a bigger screen, since it pretty much disables the touchscreen completely.
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Feb 9 2017
Dave, this is about palm rejection for capacitive / non-active stylus. Unfortunately this is happening entirely on the touch controller. So this would have to be fixed by the vendor of the touchscreen and provided as a firmware update. I am not sure if we can get vendor support for fixing this on an old model. Adlr, what do you think?
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Feb 9 2017
Yeah, unfortunately this is not something we support. I agree we should support it, and we can look to do that on future models by changing our touch spec and test criteria. For now I will mark as wontfix b/c we can't fix it on existing hardware. I know this is not the ideal answer, but if you get a Samsung Chromebook Plus/Pro, you can use stylus while resting palm on screen. |
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Comment 1 by dtapu...@chromium.org
, Jan 30 2017