1499344 - Touchscreen is incorrectly recognized on Microsoft Surface Pro 2 i5

Status: RESOLVED FIXED

(Core :: Layout, defect, P3)

Description

[Daniel Bodea [:danibodea]]

[Note]:
- A touchscreen is recognized by the test page even if it is disabled.

[Affected versions]:
- v64.0a1

[Affected platforms]:
- Windows on Microsoft Surface Pro 2 i5

[Steps to reproduce]:
1. Enable the touchscreen of the touchscreen capable device, tutorial here: 
https://support.microsoft.com/en-us/help/4028019/windows-enable-and-disable-your-touchscreen-in-windows-10 
2. Disconnect any other pointing devices.
3. Open browser and open test page:
https://hiikezoe.github.io/interaction-media-features.html
4. Leave the test page in view and disable the touchscreen from the Device Manager.

[Expected result]:
- Test page content shows:
pointer: none
any-pointer: none
hover: none
any-hover: none

[Actual result]:
- Test page content shows:
pointer: coarse
any-pointer: coarse
hover: none
any-hover: none

[Additional notes]:
- This tablet is a Microsoft Surface Pro 2 i5:
Name: DESKTOP-SE83IIG
Serial number: 019373535253
SKU: Surface Pro 2 i5
Version Information
        Embedded controller: 24.1.50.0
        System aggregator: 2.4.450.0
        UEFI: 2.5.250.0
        Wi-Fi driver: 14.69.24054.176
- In the Device Manager of the Surface Pro 2, the "Intel(R) Precise Touch Device" device does not appear, like in the case of the Surface Pro 4; 
- To disable the touch screen, I can only disable the "HID-compliant touch device" device, in which case, the "HID-compliant mouse" device would not disappear, unlike in the case of the newer Surface Pro 4.

Comment 1

[Hiroyuki Ikezoe (:hiro)]

Thanks for filing this.
As discussed on Slack, I don't think this is a blocker for Firefox 64, setting P3 at this moment.

I guess this is somewhat related to bug 1498286, we need a reliable way to tell there is no touchscreen.

Comment 2

[Chris Martin [:cmartin]]

This was fixed in Bug 1813979