Sugar gconf settings breaks mouse buttons behaviour in gnome session

[alsroot]

|TestCase|

• login to default gnome session(e.g. to new account)
• default mouse behaviour with key modifier pressed is, press <Alt> + mouse clicks to do some window related stuff
• start sugar-emulator
• out of sugar-emulator window, mouse behaviour looks like modifier was pressed(but it doesn't) to disable it, pressing <Alt> it required

Work flow is not reproducible in all cases. I got a chance to setup karmic on new notebook and got 100% of reproducibility of this issue but had to return notebook and didn't investigate issue(but found that fallback gnome session "resolves" issue). In all my current environments(VM and natinve) I can't reproduce this bug.

[alsroot]

tuukkah on #sugar said,
hmm, i've seen the same, running metacity --replace helped

could someone who can reproduce this issue run metacity with "--replace" argument(add it to emulator.py)

[alsroot]

looks like its a composite WM issue in gnome, pure metacity works fine and only adding composite effects reveals this issue

[icarito]

Replying to alsroot:

looks like its a composite WM issue in gnome, pure metacity works fine and only adding composite effects reveals this issue

Actually, pure metacity does have problems, only the symptom is different.
With compiz, <Alt> key seems "stuck".
Without compiz - <Alt> modifier key for moving windows around, does not work.

[alsroot]

Replying to icarito:

Replying to alsroot:

looks like its a composite WM issue in gnome, pure metacity works fine and only adding composite effects reveals this issue

Actually, pure metacity does have problems, only the symptom is different.
With compiz, <Alt> key seems "stuck".

yup, thats what I meant by "adding composite effects"

Without compiz - <Alt> modifier key for moving windows around, does not work.

thats known issue for 0.86(its hard to say how to isolate gconf settings that sugar rewrites)

I'm thinking about removing gconf reseting of key modifier in jhconvert distros, since sugar makes gnome compozite session unuseful.

[icarito]

Confirmed, also happens on Trisquel.
Workaround: Having a separate user for Sugar.

[tomeu]

Replying to alsroot:

I'm thinking about removing gconf reseting of key modifier in jhconvert distros, since sugar makes gnome compozite session unuseful.

Can you extend on what you mean by that? And what would be a longer term fix?

[alsroot]

Replying to tomeu:

Replying to alsroot:

I'm thinking about removing gconf reseting of key modifier in jhconvert distros, since sugar makes gnome compozite session unuseful.

Can you extend on what you mean by that? And what would be a longer term fix?

do you really need changing key modifier?
I guess in current situation we can't do something useful from sugar side.

[alsroot]

Replying to alsroot:

Replying to tomeu:

Replying to alsroot:

I'm thinking about removing gconf reseting of key modifier in jhconvert distros, since sugar makes gnome compozite session unuseful.

Can you extend on what you mean by that? And what would be a longer term fix?

do you really need changing key modifier?

oops, s/you/we/

I guess in current situation we can't do something useful from sugar side.

[tomeu]

Don't remember what "changing key modifier" means, can you explain? Thanks!

[alsroot]

sugar changes /apps/metacity/general/mouse_button_modifier
on startup, so do we really need to change existed behaviour,
in my mind situation when user holding ALT modifier can move metacity windows is unusual

At least in 0.86 we leave this gconf setting as is, and ping upstream to fix this bug for 0.88 cycle.

[tomeu]

Replying to alsroot:

sugar changes /apps/metacity/general/mouse_button_modifier
on startup, so do we really need to change existed behaviour,
in my mind situation when user holding ALT modifier can move metacity windows is unusual

Kids always manage to surprise us :/

At least in 0.86 we leave this gconf setting as is, and ping upstream to fix this bug for 0.88 cycle.

Upstream is not very actively maintained, do you have an idea of what would take a proper fix?

[alsroot]

Replying to tomeu:

Replying to alsroot:

At least in 0.86 we leave this gconf setting as is, and ping upstream to fix this bug for 0.88 cycle.

Upstream is not very actively maintained, do you have an idea of what would take a proper fix?

didn't yet look to code, but guess it shouldn't be hard to fix, just changing reaction on gconf value, will look

[alsroot]

upstream bug ​https://bugzilla.gnome.org/show_bug.cgi?id=570183

the workaround is using e.g. <Super> value for /apps/metacity/general/mouse_button_modifier since it shouldn't interfere with out Alt bindings

[alsroot]

Workaround which is used in jhconvert packages
​http://git.sugarlabs.org/projects/jhconvert/repos/mainline/blobs/master/patches/0.86/1544.patch

[tomeu]

I'm quite confused at how alsroot's workaround can work. Just tried it here and with <Super> I cannot move windows with <Alt>+Click.

That said, I don't see how it could be a problem for Sugar, so I can apply that patch if it works for the rest.

[alsroot]

Replying to tomeu:

I'm quite confused at how alsroot's workaround can work. Just tried it here and with <Super> I cannot move windows with <Alt>+Click.

The problem can be reproducible only with enabling composite effects in metacity. Just enable it in gnome, then login to sugar, then back to gnome. In gnome with enabled composite effects and 'Disabled' in mouse_button_modifier gconf key, mouse behaves like Ctrl is pressed. Maybe it was fixed in recent metacity but anyway there are desktops in field that will be affected by such ugly(in case of regular desktops, i.e., with switching between gnome/sugar) bug for some time.

That said, I don't see how it could be a problem for Sugar, so I can apply that patch if it works for the rest.

[alsroot]

Replying to tomeu:

That said, I don't see how it could be a problem for Sugar, so I can apply that patch if it works for the rest.

It's about that one login to sugar makes gnome session(with composite metacity) broken.

[tomeu]

Sounds good then.

[alsroot]

​http://git.sugarlabs.org/projects/sugar/repos/mainline/commits/c5ac2887e7cb121645747d339f7b34dc8d673992

[dnarvaez]

Milestone 0.88 deleted