[Bug 1583612] Re: touch-devices stops working after insert/remove other USB device

[Launchpad Bug Tracker]

[Expired for chromium-browser (Ubuntu) because there has been no
activity for 60 days.]

** Changed in: chromium-browser (Ubuntu)
   Status: Incomplete => Expired

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Title:
  touch-devices stops working after insert/remove other USB device

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[Bug 1583612] Re: touch-devices stops working after insert/remove other USB device

[Krzysztof]

And my list of the input devices:

$ xinput --list
⎡ Virtual core pointer  id=2[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointerid=4[slave  pointer  (2)]
⎜   ↳ Wacom ISDv4 E6 Pen stylus id=10   [slave  pointer  (2)]
⎜   ↳ Wacom ISDv4 E6 Finger touch   id=11   [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPadid=13   [slave  pointer  (2)]
⎜   ↳ Wacom ISDv4 E6 Pen eraser id=15   [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint id=16   [slave  pointer  (2)]
⎣ Virtual core keyboard id=3[master keyboard (2)]
↳ Virtual core XTEST keyboard   id=5[slave  keyboard (3)]
↳ Power Button  id=6[slave  keyboard (3)]
↳ Video Bus id=7[slave  keyboard (3)]
↳ Sleep Button  id=8[slave  keyboard (3)]
↳ Integrated Camera id=9[slave  keyboard (3)]
↳ AT Translated Set 2 keyboard  id=12   [slave  keyboard (3)]
↳ ThinkPad Extra Buttonsid=14   [slave  keyboard (3)]

Please note, the actual ids of the devices sometimes change after a
reboot. That's why in the script I wrote I had to find it automatically,
could not hard-code one id number.

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Title:
  touch-devices stops working after insert/remove other USB device

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[Bug 1583612] Re: touch-devices stops working after insert/remove other USB device

[Krzysztof]

Same issue. Unfortunately, i can't give more details because in my case
Chromium stops scrolling without plugging anything in or out... Only
after I load 3-4 webpages the next one does not react to the finger
touch*. Returning to the previous webpages does not help, the touch does
not work any longer. Restarting Chromium and loading the webpage where
previously touch stopped usually allows to scroll (untill againg 3-4
webpages are changed).

*) "Finger touch does not work" means here the browser does not
recognise finger as the finger. Clicking is still possible, but when I
try scrolling, the text is marked instead of being scrolled. In other
words, it considers the finger touch as a mouse pointer.

Regarding the flag that Koen mentions, also same here: originally, when I 
installed 14.04, touch worked in Chromium "out of the box", as they say. But 
after some updates, can't tell which, it stopped. To get it back, I started 
adding the flag, even updated the start-up script to get it automatically. At 
the time, I filed a report:
https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1526430

But about January this year, with yet another Chromium update, the
problem described above appeared: touch scrolling works (only when
Chromium is started with the flag pointing to the touch device!), but
stops after a few clicks, as described above.

I'm using Lenovo X220 tablet with Wacom touchscreen.

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Title:
  touch-devices stops working after insert/remove other USB device

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Re: [Bug 1583612] Re: touch-devices stops working after insert/remove other USB device

[Koen]

Maybe I should have specified 'stops working' some more; in order to get
touch scroll functionality we added the touch-devices flag.

This works fine, but is this expected behavior? (Is this flag usually
required for touch scroll?)

When any USB device is then (un-)plugged the flag will stop working (touch
scroll is no longer available).

I will get back to you on those xinput lists, currently on mobile.
Op 19 mei 2016 5:10 p.m. schreef "Chad Miller" :

> Whoa, it's more weird that you have to specify touch-devices at all.
> Please plug in your device, run "xinput list --long" and attach the
> results with a good comment.
>
> Then, plug in your other device, run it again, attach with a good
> comment.
>
> Then, remove your other device, run it again, and attach that.
>
> ** Changed in: chromium-browser (Ubuntu)
>Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1583612
>
> Title:
>   touch-devices stops working after insert/remove other USB device
>
> Status in chromium-browser package in Ubuntu:
>   Incomplete
>
> Bug description:
>   When using the --touch-devices= flag to enable touch
>   support in Chromium (or Chrome) the removal or insertion of a USB
>   device (which does not cause the ID of the touch device to change)
>   causes the functionality (finger-scrolling) to stop working until the
>   browser/app is restarted.
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1583612/+subscriptions
>

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Title:
  touch-devices stops working after insert/remove other USB device

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[Bug 1583612] Re: touch-devices stops working after insert/remove other USB device

[Chad Miller]

Whoa, it's more weird that you have to specify touch-devices at all.
Please plug in your device, run "xinput list --long" and attach the
results with a good comment.

Then, plug in your other device, run it again, attach with a good
comment.

Then, remove your other device, run it again, and attach that.

** Changed in: chromium-browser (Ubuntu)
   Status: New => Incomplete

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Title:
  touch-devices stops working after insert/remove other USB device

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