Scrolling inertia for webapps died on Meizu MX4 (stable channel)

[dinamic]

Scrolling inertia for webapps died on Meizu MX4 (stable channel)

testing with g+ and omgubuntu, no scrolling inertia. i can scroll but the context sticks to my finger.. 0 inertia

if you have any idea how i can debug this, i'll be happy to do so

[Oliver Grawert (ogra)]

i see the same, obviously holding the home button til it switches to the first scope and then switching back to the app seems to help in my case.

[Pat McGowan (pat-mcgowan)]

@david can you add the appropriate packages here

[dinamic (dinamic6661)]

scrolling *inertia*

[David Barth (dbarth)]

Trying on my MX4 with image 15.04/r4, I can't see that at first sight. Tested with Google+ (the canonical app), and Facebook. I couldn't login with ogra's G+ but the different UA seemed to introduce a different feel to the public home screen. So that may be due to css code that thinks it's on Chrome/Android.

[Oliver Grawert (ogra)]

i see it on all webapps occasionally, even in the browser ... running rc-proposed on MX4

[Oliver Grawert (ogra)]

note that there is no real reciepe to reproduce it, it can take days til it shows up, at least for me ... probably the OP has a way to reproduce it more reliably ?

[dinamic (dinamic6661)]

i don't know how to trigger/debug this bug, it just happens

[Alexandre Abreu (abreu-alexandre)]

I haven't been able to repro it yet on Mx4,

[David Barth (dbarth)]

To try to extract some more data about the circumstances, you can try 2
things:
1. scan the app logs for error or debug messages about touch events: is
there anything suspicious in the logs when that error occurs ?
2. start an app that is prone to exposing the issue with the --inspector
flag; the easiest way is to go modify the desktop file in /opt/click and
add the flag on the app commandline. Then, once the issue occurs, connect
on the debug console from Chrome (http://<ip of your phone>:9221) and watch
the JS console

On Tue, Sep 15, 2015 at 2:59 PM, Alexandre Abreu <
<email address hidden>> wrote:

> I haven't been able to repro it yet on Mx4,
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1494770
>
> Title:
> Scrolling inertia for webapps died on Meizu MX4 (stable channel)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/canonical-devices-system-image/+bug/1494770/+subscriptions
>

[taiebot65 (dedreuil)]

just got this on my nexus 4 running RC proposed

http://paste.ubuntu.com/12430472/

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[David Barth (dbarth)]

Thanks for the pastebin. In that case the pages seem to have several layout issues which may have impacted scrolling inertia.
Still it is more surprising in the case of Google+ pages since it's a basic feature of the user interface, and reporters indicate it stops working suddenly.
Thanks in advance if you can post more logs or elements to try to narrow down the issue.

[dinamic (dinamic6661)]

when the inertia dies, it dies system wide, web browser and all the web apps

[dinamic (dinamic6661)]

also happened twice (again) since my last report

[David Barth (dbarth)]

Ah, that's a very interesting observation; that would make it less like a
web component issue, and more like a touch input problem, ie at the system
level, not app.

On Wed, Sep 23, 2015 at 2:43 PM, dinamic <email address hidden> wrote:

> also happened twice (again) since my last report
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1494770
>
> Title:
> Scrolling inertia for webapps died on Meizu MX4 (stable channel)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/canonical-devices-system-image/+bug/1494770/+subscriptions
>

[David Barth (dbarth)]

Could you try attaching the part of /var/log/syslog corresponding to that
period ? Or look for suspicious messages about the touch / event system
maybe ?
I tried again a few times, but i may restart / flash my system too often
here.

On Wed, Sep 23, 2015 at 7:20 PM, David Barth <email address hidden>
wrote:

> Ah, that's a very interesting observation; that would make it less like a
> web component issue, and more like a touch input problem, ie at the system
> level, not app.
>
> On Wed, Sep 23, 2015 at 2:43 PM, dinamic <email address hidden>
> wrote:
>
>> also happened twice (again) since my last report
>>
>> --
>> You received this bug notification because you are a bug assignee.
>> https://bugs.launchpad.net/bugs/1494770
>>
>> Title:
>> Scrolling inertia for webapps died on Meizu MX4 (stable channel)
>>
>> To manage notifications about this bug go to:
>>
>> https://bugs.launchpad.net/canonical-devices-system-image/+bug/1494770/+subscriptions
>>
>
>

[Alexandre Abreu (abreu-alexandre)]

Could you check (to be more certain about the "system level" side) if e.g. apps w/ long scrolling like the messaging app (when viewing a list of sms') also behaves like that (when you are in a situation where you can repro it) ?

[dinamic (dinamic6661)]

sure :D next time

but isn't messaging app a qml app? qml apps are not effected. only the browser and all the web apps, there is probably something wrong with oxide?

[Alexandre Abreu (abreu-alexandre)]

@dinamic: there are no obvious connections between all the oxide based apps, the fact that they seem to all be affected is a hint, but the potential "system related" side of things might not be that tied to oxide itself,

[David Barth (dbarth)]

The easiest though would be a way for us to reproduce the problem more
systematically. Then we can look at that from various angles.
Can you think of particular circumstances to trigger the bug? Like a URL,
website or number of open apps / webapps for example ? Or the duration
after which you noticed the app is affected by this inertia?

On Thu, Sep 24, 2015 at 3:10 PM, Alexandre Abreu <
<email address hidden>> wrote:

> @dinamic: there are no obvious connections between all the oxide based
> apps, the fact that they seem to all be affected is a hint, but the
> potential "system related" side of things might not be that tied to
> oxide itself,
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1494770
>
> Title:
> Scrolling inertia for webapps died on Meizu MX4 (stable channel)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/canonical-devices-system-image/+bug/1494770/+subscriptions
>

[David Barth (dbarth)]

There hasn't been much further reports of scrolling problems on mx4. Marking as an incomplete for now.