LE 7.90.007 - tearing during video playback

matthias · October 14, 2016 at 11:48 PM

I am running LibreELEC v7.90.007 ALPHA on an AMD E2-2000 APU with Radeon GPU attached to a Philips TV set via HDMI. Since the last upgrade (from v7.90.005 to v7.90.007) I see tearing during video playback (HD and SD material) and on the user interface as well. I played around with the configuration options "Adjust display refresh rate" and "Sync playback to display" but it did not make a difference.

It seems that "VSync" has been disabled in this release. Is there a way to turn it back on?

I have not seen tearing with Kodi v17 beta 3 on a Windows 10 PC. Therefore I assume it is a LibreELEC issue.

schumi2004 · October 16, 2016 at 9:42 PM

Mmmmm sounds like we both have the same issue, i thought it had something to do with (de)interlacing. (i'm no expert in this)

LibreELEC

matthias · October 21, 2016 at 8:48 PM

It seems the problem is the 2D hardware acceleration of the video driver. Since alpha 7 LibreElec uses Glamor. I downgraded to alpha 6 which still uses EXA and the tearing is gone. Alternatively it should be possible to change /etc/X11/xorg_radeon.conf to use EXA in alpha 7, but I have not tried that.

PeterPan · October 26, 2016 at 10:09 PM

Quote from matthias

It seems the problem is the 2D hardware acceleration of the video driver. Since alpha 7 LibreElec uses Glamor. I downgraded to alpha 6 which still uses EXA and the tearing is gone. Alternatively it should be possible to change /etc/X11/xorg_radeon.conf to use EXA in alpha 7, but I have not tried that.

Yes, that is the problem. I have change the configuration bak to EXA and the tearing is gone
I have an E350 with LibreElec 7.90.007

**chewitt** · October 27, 2016 at 7:06 AM Official Post

For the sake of completeness can someone copy/paste the EXA xorg.conf here so that other users can find it. Thanks.

llkobe · October 29, 2016 at 11:57 AM

Quote from PeterPan

Yes, that is the problem. I have change the configuratopn bak to EXA and the tearing is gone
I habe an E350 with LibreElec 7.90.007

How did you do that? I have the same issue, but when I try to edit the xorg_radeon.conf file, it is read only.
Could you please tell me the steps how did you edit it? Thanks!

kaiserex · October 29, 2016 at 2:14 PM

Quote from PeterPan

Yes, that is the problem. I have change the configuratopn bak to EXA and the tearing is gone
I habe an E350 with LibreElec 7.90.007

I have the same exact setup and having this tearing issues primarily on top of the picture, it awful. I'm trying to edit "xorg-radeon.conf" file trough sftp but I just cant edit, delete, overwrite the file. I'm logged as user: root--->>pass: libreelec. This is the log errors - any ides why cant to this basic actions?

Code

15:10:58.932 Current date: 2016-10-29
15:10:58.932 SFTP session on '192.168.1.22:22' started successfully. Using SFTP protocol version 3.
15:10:58.932 Listing local folder 'C:\Users\kaise\Desktop' succeeded.
15:10:58.932 Changing current local folder to 'C:\Users\kaise\Desktop' succeeded.
15:10:58.948 Listing remote folder '/storage' succeeded.
15:10:58.948 Changing current remote folder to '/storage' succeeded.
15:10:58.948 Stating symbolic link '/storage/devupdate' failed. Stat failed with SFTP error NoSuchFile: No such file.
15:11:06.752 Listing remote folder '/' succeeded.
15:11:06.752 Changing current remote folder to '/' succeeded.
15:11:06.752 Stating symbolic link '/lib64' succeeded.
15:11:06.767 Stating symbolic link '/media' succeeded.
15:11:07.872 Listing remote folder '/etc' succeeded.
15:11:07.872 Changing current remote folder to '/etc' succeeded.
15:11:07.872 Stating symbolic link '/etc/firmware' succeeded.
15:11:07.872 Stating symbolic link '/etc/hostname' succeeded.
15:11:07.872 Stating symbolic link '/etc/hosts' succeeded.
15:11:07.872 Stating symbolic link '/etc/localtime' succeeded.
15:11:07.872 Stating symbolic link '/etc/machine-id' succeeded.
15:11:07.872 Stating symbolic link '/etc/modprobe.d' succeeded.
15:11:07.872 Stating symbolic link '/etc/modules-load.d' succeeded.
15:11:07.872 Stating symbolic link '/etc/motd' succeeded.
15:11:07.872 Stating symbolic link '/etc/mtab' succeeded.
15:11:07.872 Stating symbolic link '/etc/rc_keymaps' succeeded.
15:11:07.872 Stating symbolic link '/etc/request-key.d' failed. Stat failed with SFTP error NoSuchFile: No such file.
15:11:07.872 Stating symbolic link '/etc/resolv.conf' succeeded.
15:11:07.872 Stating symbolic link '/etc/sysctl.d' succeeded.
15:11:07.888 Stating symbolic link '/etc/tmpfiles.d' succeeded.
15:11:10.296 Listing remote folder '/etc/X11' succeeded.
15:11:10.296 Changing current remote folder to '/etc/X11' succeeded.
15:11:11.497 Listing local folder 'C:\Users\kaise\Desktop\X11' succeeded.
15:11:11.497 Changing current local folder to 'C:\Users\kaise\Desktop\X11' succeeded.
15:11:27.993 Passing upload list to upload manager succeeded.
15:11:27.993 Uploading local file 'C:\Users\kaise\Desktop\X11\xorg-radeon.conf' started. Using 'auto/lf' transfer mode.
15:11:27.993 Uploading local file 'C:\Users\kaise\Desktop\X11\xorg-radeon.conf' failed. Opening remote file '/etc/X11/xorg-radeon.conf' failed. Open failed with SFTP error Failure: Failure.

Display More

**chewitt** · October 29, 2016 at 2:16 PM Official Post

cp /etc/X11/xorg-radeon.conf /storage/.config/xorg.conf

then edit, and it will be used instead of the embedded (not editable) one on reboot.

llkobe · October 29, 2016 at 2:54 PM

Quote from chewitt

cp /etc/X11/xorg-radeon.conf /storage/.config/xorg.conf

Worked great, thank you very much!!

kaiserex · October 29, 2016 at 3:03 PM

Quote from chewitt

cp /etc/X11/xorg-radeon.conf /storage/.config/xorg.conf

then edit, and it will be used instead of the embedded (not editable) one on reboot.

Thanks it works

schumi2004 · November 27, 2016 at 1:37 PM

What exactly needs to be changed to use EXA?

/edit:
Should we change this: Option "AccelMethod" "glamor"
to this: Option "AccelMethod" "EXA"

Code

~/.config # more xorg.conf
Section "Device"
        Identifier  "AMD Graphics"
        Driver      "radeon"
        Option      "DRI3"        "1"
        Option      "AccelMethod" "glamor"
Endsection

schumi2004 · November 27, 2016 at 7:03 PM

Just tested this but picture quality just get worse, even more tearing.
How should this EXA be enabled properly?

Can't i just export current xorg configuration and use that?

I tried the following but it returns an error, will try again when box is free of users.

Code

Xorg :0 -configure
_XSERVTransTransNoListen: unable to find transport: tcp
Failed to disable listen for tcp transport(EE)
Fatal server error:
(EE) Server is already active for display 0
        If this server is no longer running, remove /tmp/.X0-lock
        and start again.
(EE)
(EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
(EE)

Display More

/edit:
I reverted this commit to see how it works

xf86-video-ati: add xorg-radeon.conf to enable dri3 and glamor · LibreELEC/LibreELEC.tv@ca11388 · GitHub

valmadiaz · November 30, 2016 at 7:43 PM

Does any one have also a similar problem with an nvidia graphic card? I have a GeForce 9300M GS with an Intel(R) Core(TM)2 Duo CPU P8600.
I am running LE 7.90.008 and the tearing is awful in HD videos. Before I had the stable 7.0.2 without any tearing in any videos.

As there is no glamor acceleration option in the nvidia or nvidia legacy config file, the problem might be totally different but the effect you describe
seam to be the same.

I will check it in the following beta and will open a new threat if the problem still exist. It's is probably unrelated.
(Without any hardware acceleration it works fine.)

lesydimitri · December 13, 2016 at 1:05 PM

I also experienced screen tearing in the latest beta.

I solved it with the following xorg.conf (in /storage/.config/).

Code

Section "Device"
        Identifier  "AMD Graphics" 
        Driver      "radeon"
        Option      "DRI3"        "1"
        Option      "AccelMethod" "EXA"
        Option      "EXAVSync" "yes"
Endsection

schumi2004 · December 13, 2016 at 2:47 PM

Quote from lesydimitri

I also experienced screen tearing in the latest beta.

I solved it with the following xorg.conf (in /storage/.config/).

Code

Section "Device"
        Identifier  "AMD Graphics" 
        Driver      "radeon"
        Option      "DRI3"        "1"
        Option      "AccelMethod" "EXA"
        Option      "EXAVSync" "yes"
Endsection

Thanks for your config, i missed Option "EXAVSync" "yes" maybe that's why it only got worse.
Will do another attempt when new releases is published. Currently i just removed the patch responsable for this and compiled a new build and this resolved it also.

**mglae** · December 13, 2016 at 4:04 PM

Quote from schumi2004

Currently i just removed the patch responsable for this and compiled a new build and this resolved it also.

In this case just put an empty xorg.conf in /storage/.config

schumi2004 · December 13, 2016 at 8:41 PM

Quote from mglae

In this case just put an empty xorg.conf in /storage/.config

Why do i want to do that?
It works now so why change it?

**mglae** · December 13, 2016 at 9:57 PM

Quote from schumi2004

Why do i want to do that?
It works now so why change it?

... after the next release. This disables the new default Radeon xorg.conf too and avoids building LE yourself.