On Tue, Nov 25, 2014 at 09:30:07PM +1000, Peter Hutterer wrote: > Pointer acceleration for relative input devices (mice, trackballs, etc.) > applies to the deltas of the device. Alas, those deltas have no physical > reference point - a delta of 10 may be caused by a large movement of a low-dpi > mouse or by a minute movement of a high-dpi mouse. > Which makes pointer acceleration a bit useless and high-dpi devices > essentially unusable. > > In an ideal world, we could read the DPI from the device directly and work > with that. In the world we actually live in, we need to compile this list > manually. This patch introduces the database, with the usual match formats and > a single property to be set on a device: MOUSE_DPI > > That is either a single value for most mice, or a list of values for mice that > can change resolution at runtime. The exact format is detailed in the hwdb > file. > > Note that we're explicitly overshooting the requirements we have for libinput > atm. Frequency could be detected in software and we don't actually use the > list of multiple resolutions (because we can't detect when they change > anyway). However, we might as well collect those values from the get-go, > adding/modifying what will eventually amount to hundreds of entries is a > bit cumbersome. > > Note: we rely on the input_id builtin to tag us as mouse first, ordering of > the rules is important.
[...] > --- > +########################################## > +# Lenovo > +########################################## > + > +mouse:usb:v17efp6019:name:Lenovo Optical USB Mouse: > + MOUSE_DPI=1000@125 urgh, and I just noticed that I had a double-space here which caused the whole thing to break for this mouse (but is hard to see in the udevadm output...) I'll send a new revision once we decide what to do with the naming. Plus, would a fix be welcome to ignore multiple leading whitespaces? This has caught me several times now and I keep making this mistake. Cheers, Peter _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel