Dock doesn't recognize mouse-cursor leaving and doesn't hide

[Rene Arts]

Plank does not hide correctly when switching to a window on another workspace (using plank).

How to reproduce:
1. Place mouse pointer on plank icon of a window on another workspace
2. Swich to desired window by clicking or scrolling and quickly move mouse pointer from the plank region (so just a quick fling up)
3. Plank does not hide while it should; with icon-zoom enabled the icon stays in the enlarged state.

It looks like plank is not detecting (correctly) that the mouse has moved out of its 'interest' region.

Notes:
- This seems to be easier with the newer icon-zoom feature on, though is defenitely reproducible with older versions
- I have fairly high mouse speed/sensitivity (3cm covers the width of the screen: 2560px).
- Tested and reproduced with all hide modes, except auto-hide.

When a screencast is needed/handy for illustration, please let me know!

Specs:
Ubuntu 14.04 kernel 3.13.0-57-generic
Nvidia 331.113
xorg-server 2:1.15.1-0ubuntu2.7
Unity 7.2.5

[Rico Tzschichholz (ricotz)]

Since you didn't attach a log I must assume you are running plank with the gtk+ 3.10.8 package provided in trusty.

So far I am not able to reproduce this with gtk+ 3.17.5

[Rene Arts (renearts)]

I am indeed running standard gtk, which is 3.10(.8?) if I'm correct. I'll try to provide a log next monday, as it is on my desktop at work.

[Rene Arts (renearts)]

Gtk version is indeed 3.10.8-0ubuntu1.5

Just made a verbose debug log.
Method:
- Started plank -d -v
- Switched to window on other workspace, move mouse pointer quickly form plank (upwards)
- Icon stays zoomed, plank not hidden

Please let me know if you need more info.

http://pastebin.com/5fRhtWGf

[Rico Tzschichholz (ricotz)]

It is pretty hard to reproduce this :-\

Simply moving the mouse fast off the dock isn't working here. Although I saw it once recently.

I am testing a patch locally. Would you be able to compile and test the modified source locally yourself?

[Rene Arts (renearts)]

I can at least give it a try to compile and test.
I am able to reproduce it here at +-9/10 times --> testing won't be a big problem unfortunately :)

[Rico Tzschichholz (ricotz)]

I attached the corresponding source branch to this bug.

[Rene Arts (renearts)]

Just compiled and installed it, problem still exists, does not seem to have changed so much.

Log: http://pastebin.com/sgFuLD8K

[Rene Arts (renearts)]

I also made a screencast to show you something.
After switching the icon stays in the zoomed state, though I can still hover on it with the pointer without it being activated.

I guess the bug seems to be related to the 'active' region of plank?

https://youtu.be/HDWe1yOo1vo

[Rico Tzschichholz (ricotz)]

Thanks for testing, the problem in your screencast is normal and simply a result of this bug.

I am starting to suspect nvidia-blob. I am using 352.21 here too.

Since nvidia 331.113 is not supported anymore. Please upgrade to 340.76 which should be compatible with your system.

[Rene Arts (renearts)]

Just installed nvidia-352.21, still no improvement.

[Rico Tzschichholz (ricotz)]

@renearts: I hope you can give this new fix a try and hopefully confirm it fixes the problem for you.

https://code.launchpad.net/~ricotz/plank/handle-cursor-leave

[Rene Arts (renearts)]

Just compiled, installed and tried it; unfortunately, it doesn't fix it.

[Rico Tzschichholz (ricotz)]

@renearts: Just to be certain, please do this from inside a clean trunk checkout: "./autogen.sh && make -j3 && src/plank -d". Make sure there is nothing plank related in /usr/local/

[Rene Arts (renearts)]

Good to doublecheck: removed some stuff from /usr/local and built it according to your instruction. Seems to work fine now!
Thanks :)

[Rico Tzschichholz (ricotz)]

Alright, that is what I was hoping for.