Keyboard & Mouse stop working correctly on Ubuntu 16.04 #50633

New Issue

Guilherme Salomao · 2017-02-09T18:07:58+01:00

Guilherme Salomao commented

2017-02-09 18:07:58 +01:00

System Information
Ubuntu 16.04
Intel® HD Graphics 5500 (Broadwell GT2)
Dell Laptop with Touchpad (multitouch support)

Blender Version
Broken: 2.78a e8299c8

Short description of error
Tested on VSE:
Sometimes the keyboard & mouse stop working correctly in Blender and I have to press the Alt key twice (to open and close Ubuntu HUD), or press the Super key twice (to open and close Unity Dash) or press Alt+Tab once (to select Blender window, even though it already looks selected).

It happens after some time almost every time I'm editing videos, but looks like random behavior. There is, though, one thing that reproduces the bug every time: I have TouchEgg installed, and every time I use the laptop's touchpad to change from one workspace to another, Blender stops receiving keyboard & mouse inputs (except for clicking on buttons like 'File', 'Window', 'Help'). But if I use the keyboard shortcut to change workspaces, Blender still works normal.

Exact steps for others to reproduce the error

Make sure you have multiple workspaces enabled on your Ubuntu 16.04 and that the shortcut to change from one to the other is Ctrl+Alt+Right / Left.
Then install TouchEgg on Ubuntu and setup a touchegg.conf file containing at least this:

<gesture type="DRAG" fingers="4" direction="LEFT">
            <action type="SEND_KEYS">Control+Alt+Right</action>
</gesture>

Then open Blender and select Video Editing as the screen layout.
Drag your fingers on the touchpad to change workspaces two times: once to go to another and again to go back to where Blender window is.
Hover your mouse cursor over some part and press Shift+F2 /F3/F4/F5....F12. Any of those shortcuts will not work.
Now try clicking on the timeline to move the green line. Nothing happens.
Press Alt key to open the HUD then press it again to close it.
Everything works again.

**System Information** Ubuntu 16.04 Intel® HD Graphics 5500 (Broadwell GT2) Dell Laptop with Touchpad (multitouch support) **Blender Version** Broken: 2.78a e8299c8 **Short description of error** Tested on VSE: Sometimes the keyboard & mouse stop working correctly in Blender and I have to press the Alt key twice (to open and close Ubuntu HUD), or press the Super key twice (to open and close Unity Dash) or press Alt+Tab once (to select Blender window, even though it already looks selected). It happens after some time almost every time I'm editing videos, but looks like random behavior. There is, though, one thing that reproduces the bug every time: I have TouchEgg installed, and every time I use the laptop's touchpad to change from one workspace to another, Blender stops receiving keyboard & mouse inputs (except for clicking on buttons like 'File', 'Window', 'Help'). But if I use the keyboard shortcut to change workspaces, Blender still works normal. **Exact steps for others to reproduce the error** 1. Make sure you have multiple workspaces enabled on your Ubuntu 16.04 and that the shortcut to change from one to the other is Ctrl+Alt+Right / Left. 2. Then install TouchEgg on Ubuntu and setup a touchegg.conf file containing at least this: ``` <gesture type="DRAG" fingers="4" direction="LEFT"> <action type="SEND_KEYS">Control+Alt+Right</action> </gesture> ``` 3. Then open Blender and select Video Editing as the screen layout. 4. Drag your fingers on the touchpad to change workspaces two times: once to go to another and again to go back to where Blender window is. 5. Hover your mouse cursor over some part and press Shift+F2 /F3/F4/F5....F12. Any of those shortcuts will not work. 6. Now try clicking on the timeline to move the green line. Nothing happens. 7. Press Alt key to open the HUD then press it again to close it. 8. Everything works again.

Guilherme Salomao commented

2017-02-09 18:07:58 +01:00

Changed status to: 'Open'

Guilherme Salomao commented

2017-02-09 18:07:58 +01:00

Added subscriber: @gmsalomao2

Bastien Montagne commented

2017-02-10 11:52:00 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2017-02-10 11:52:00 +01:00

You are using some third party app messing with event system and desktop-level stuff here. hard to tell in this condition which one is faulty, but my bet would be, that when gnome changes the workspace from touchegg-generated event, it’s missing something to resume correctly 'active' status (at least for Blender, does this also affect other applications btw?).

E.g., does touchegg generates the key press and release events?

You are using some third party app messing with event system **and** desktop-level stuff here. hard to tell in this condition which one is faulty, but my bet would be, that when gnome changes the workspace from touchegg-generated event, it’s missing something to resume correctly 'active' status (at least for Blender, does this also affect other applications btw?). E.g., does touchegg generates the key press **and** release events?

Guilherme Salomao commented

2017-02-11 00:16:03 +01:00

In #50633#416620, @mont29 wrote:
You are using some third party app messing with event system and desktop-level stuff here. hard to tell in this condition which one is faulty, but my bet would be, that when gnome changes the workspace from touchegg-generated event, it’s missing something to resume correctly 'active' status (at least for Blender, does this also affect other applications btw?).

E.g., does touchegg generates the key press and release events?

This does not affect any other applications at all. I've just tested the same shortcuts (Shift + F1/F2...) with another application and works great.
I don't know the answer to the last question, but since it only happens with Blender, I believe touchegg is not the issue. Also, the bug happens randomly too, as I wrote in the description. Before I even had touchegg installed it was already happening, but I couldn't find a way of reproducing the error.

> In #50633#416620, @mont29 wrote: > You are using some third party app messing with event system **and** desktop-level stuff here. hard to tell in this condition which one is faulty, but my bet would be, that when gnome changes the workspace from touchegg-generated event, it’s missing something to resume correctly 'active' status (at least for Blender, does this also affect other applications btw?). > > E.g., does touchegg generates the key press **and** release events? This does not affect any other applications at all. I've just tested the same shortcuts (Shift + F1/F2...) with another application and works great. I don't know the answer to the last question, but since it only happens with Blender, I believe touchegg is not the issue. Also, the bug happens randomly too, as I wrote in the description. Before I even had touchegg installed it was already happening, but I couldn't find a way of reproducing the error.

Joey Ferwerda commented

2017-02-22 16:49:08 +01:00

Added subscriber: @TheOnlyJoey

Joey Ferwerda commented

2017-02-22 16:49:08 +01:00

Changed status from 'Open' to: 'Archived'

Joey Ferwerda closed this issue

2017-02-22 16:49:08 +01:00

Joey Ferwerda self-assigned this 2017-02-22 16:49:08 +01:00

Joey Ferwerda commented

2017-02-22 16:49:08 +01:00

This is not something we can fix, I have tried reproducing this on a Laptop with 16.04 (Both with Unity and GNOME 3) and can not reproduce this.
I would suspect this being either a hardware specific bug or a issue with external bindings through a third party application.

As we can not reproduce or have the specific hardware, this can not be considered to be a Blender bug. Closing.

This is not something we can fix, I have tried reproducing this on a Laptop with 16.04 (Both with Unity and GNOME 3) and can not reproduce this. I would suspect this being either a hardware specific bug or a issue with external bindings through a third party application. As we can not reproduce or have the specific hardware, this can not be considered to be a Blender bug. Closing.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Keyboard & Mouse stop working correctly on Ubuntu 16.04 #50633