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-   -   ghost images/trails of windows when moving (https://displaylink.org/forum/showthread.php?t=64796)

digiflash 09-21-2016 04:39 PM

ghost images/trails of windows when moving
 
I installed the latest 1.2 version of the driver today.
I'm using Linux Mint 18 with Cinnamon.
When moving windows over the desktop there are ghost images of the windows.
In the earlier version my mouse had ghost trails.

mlukaszek 09-27-2016 02:04 PM

Hi,

Is this also visible on a screen shot captured with Print Screen? If yes, then the compositor already messed up the framebuffers we take pixels from. If screenshot is fine, please collect logs and attach here. If it's not, try with a different window environment.

Thanks,
Michal

maximih 09-30-2016 02:30 PM

I have the same issue
 
Hi

I have the same issue.

I am using Ubuntu 14.04 , with 4.4.0-38-generic kernel.

The issue happens mainly when I use Gnome 2 and the screen shot does not include the ghost windows. Actually when doing the screen shot the screen is refreshed and the ghost window disappear. They come back when I move any window.

When using Unity I cannot reproduce it but then I get 200% CPU consumed by Displaylink Manager (I have the same issue with the older drivers).

I went back to 1.1 version for now.

digiflash 10-01-2016 09:43 AM

Quote:

Originally Posted by mlukaszek (Post 81330)
Hi,

Is this also visible on a screen shot captured with Print Screen? If yes, then the compositor already messed up the framebuffers we take pixels from. If screenshot is fine, please collect logs and attach here. If it's not, try with a different window environment.

Thanks,
Michal

No then the screen is refreshed before the screenshot is taken.

digiflash 10-01-2016 09:48 AM

Seems to be a driver issue (Intel). There a 4 messages per second in dmesg.
Due to a display-id which isn't recognized (I think less than 1).

maximih 11-07-2016 12:19 PM

Quote:

Originally Posted by digiflash (Post 81405)
Seems to be a driver issue (Intel). There a 4 messages per second in dmesg.
Due to a display-id which isn't recognized (I think less than 1).

Can you paste some examples of those messages?

I have the ghost images/trails issue with all 1.2.* drivers (not with 1.1) but I don't see any error in dmesg. You can find a screen photo here:

https://drive.google.com/file/d/0B-X...ew?usp=sharing

Thanks

mlukaszek 11-07-2016 12:35 PM

@maximih: could you check a screenshot as well? (not the photo) It would show if the framebuffers are fine. Also, please attach the logs captured with Linux Support Tool so we know what kind of environment you have.

Cheers,
Michal

maximih 11-07-2016 12:48 PM

2 Attachment(s)
Quote:

Originally Posted by mlukaszek (Post 81839)
@maximih: could you check a screenshot as well? (not the photo) It would show if the framebuffers are fine. Also, please attach the logs captured with Linux Support Tool so we know what kind of environment you have.

Cheers,
Michal

The screenshot looks fine. The display is refreshed when the screenshot is triggered.

See attached the screenshot and the support tool output.

mlukaszek 11-07-2016 12:55 PM

Hmm. Can you ssh to the machine and try to capture a screen from the console? (assuming it won't redraw full screen before taking a grab).

Or, alternatively, if you're willling and have time - you could perhaps try `monitorsim` from https://github.com/mlukaszek/evdipp/. Firstly, it would show if similar corruption can be reproduced with any evdi client, but also - this makes screenshots every 10s and saves it to a PNG file.

Cheers,
Michal

maximih 11-07-2016 01:11 PM

1 Attachment(s)
Quote:

Originally Posted by mlukaszek (Post 81841)
Hmm. Can you ssh to the machine and try to capture a screen from the console? (assuming it won't redraw full screen before taking a grab).

Or, alternatively, if you're willling and have time - you could perhaps try `monitorsim` from https://github.com/mlukaszek/evdipp/. Firstly, it would show if similar corruption can be reproduced with any evdi client, but also - this makes screenshots every 10s and saves it to a PNG file.

Cheers,
Michal

I did a screenshot from the terminal using input command. The screen did not refresh in this case (so it still shows ghost images on the second and third screens to the right) but the screenshot looks ok (except some strange blue colours - my background is currently red). See attached.


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