[systemd-bugs] [Bug 90540] New: Add DPI information for MS Arc Touch Mouse

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90540

            Bug ID: 90540
           Summary: Add DPI information for MS Arc Touch Mouse
           Product: systemd
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: bugzilla at hadess.net
        QA Contact: systemd-bugs at lists.freedesktop.org

$ sudo ./mouse-dpi-tool /dev/input/event17 
Mouse Arc Touch Mouse SE on /dev/input/event17
Move the device 250mm/10in or more along the x-axis.
Pause 3 seconds before movement to reset, Ctrl+C to exit.
Covered distance in device units:    11345 at frequency infHz Hz\^C    -
Estimated sampling frequency: -2147483648Hz
To calculate resolution, measure physical distance covered
and look up the matching resolution in the table below
     720mm       28.36in         400dpi
     480mm       18.91in         600dpi
     360mm       14.18in         800dpi
     288mm       11.35in        1000dpi
     240mm        9.45in        1200dpi
     205mm        8.10in        1400dpi
     180mm        7.09in        1600dpi
     160mm        6.30in        1800dpi
     144mm        5.67in        2000dpi
     130mm        5.16in        2200dpi
     120mm        4.73in        2400dpi
If your resolution is not in the list, calculate it with:
    resolution=11345/inches, or
    resolution=11345 * 25.4/mm

Entry for hwdb match (replace XXX with the resolution in DPI):
mouse:bluetooth:v045ep07f3:name:Arc Touch Mouse SE:
 MOUSE_DPI=XXX at -2147483648

The estimated frequency is completely out of whack, but the USB dongley version
of the mouse is advertised as 1000dpi:
http://www.cnet.com/products/microsoft-arc-touch-mouse-black-series/specs/

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