How to set SyncToVBlank with GDM ?

ghaefb · 05-08-06, 04:17 AM

I'm running FedoraCore5 with Xgl. I know about the __GL_SYNC_TO_VBLANK=1 option, which fixes the tearing of some opengl effect in Xgl.

It's all good if I run Xgl with my custom script from init 3, I just export __GL_SYNC_TO_VBLANK=1 and it works.

But the problem is that now I'm using GDM login with Xgl, so I can normaly login to my Gnome session, but I don't know how to export sync to vblank now.

I read that you can export in /etc/init.d/gdm or /etc/init.d/xdm or even in /etc/environment somehow. I don't have gdm or xdm file on my Fedora and the environment file doesn't work for me either.

Is there a proper way to export/pass this option when using GDM ?
How...

**Thunderbird** · 05-08-06, 06:52 AM

You could add it to your .xinitrc file which is loaded at X startup. Not sure if the 'standard' X server catches it before starting Xgl though. Else as a hack add it to your .bashrc or /etc/profile

ghaefb · 05-08-06, 11:52 AM

No, nothing really works.
I tried all these methods but still nothing...

Anything else I can do ?

**Thunderbird** · 05-08-06, 04:57 PM

Setting the variable from within /etc/profile should work. Make sure you logout and relogin or just reboot. Also watch out with .bashrc similar things apply (restart your shell).

ghaefb · 05-09-06, 11:56 PM

Ok I'll try again
I just put this line at the end of the file, right ?

export __GL_SYNC_TO_VBLANK=1

EDIT: No, not working.

05-08-06, 04:17 AM	#1
ghaefb Registered User Join Date: Apr 2006 Posts: 6	How to set SyncToVBlank with GDM ? I'm running FedoraCore5 with Xgl. I know about the __GL_SYNC_TO_VBLANK=1 option, which fixes the tearing of some opengl effect in Xgl. It's all good if I run Xgl with my custom script from init 3, I just export __GL_SYNC_TO_VBLANK=1 and it works. But the problem is that now I'm using GDM login with Xgl, so I can normaly login to my Gnome session, but I don't know how to export sync to vblank now. I read that you can export in /etc/init.d/gdm or /etc/init.d/xdm or even in /etc/environment somehow. I don't have gdm or xdm file on my Fedora and the environment file doesn't work for me either. Is there a proper way to export/pass this option when using GDM ? How...

05-08-06, 06:52 AM	#2
Thunderbird Join Date: Jul 2002 Location: Netherlands, Europe Posts: 2,105	Re: How to set SyncToVBlank with GDM ? You could add it to your .xinitrc file which is loaded at X startup. Not sure if the 'standard' X server catches it before starting Xgl though. Else as a hack add it to your .bashrc or /etc/profile

05-08-06, 11:52 AM	#3
ghaefb Registered User Join Date: Apr 2006 Posts: 6	Re: How to set SyncToVBlank with GDM ? No, nothing really works. I tried all these methods but still nothing... Anything else I can do ?

05-08-06, 04:57 PM	#4
Thunderbird Join Date: Jul 2002 Location: Netherlands, Europe Posts: 2,105	Re: How to set SyncToVBlank with GDM ? Setting the variable from within /etc/profile should work. Make sure you logout and relogin or just reboot. Also watch out with .bashrc similar things apply (restart your shell).

05-09-06, 11:56 PM	#5
ghaefb Registered User Join Date: Apr 2006 Posts: 6	Re: How to set SyncToVBlank with GDM ? Ok I'll try again I just put this line at the end of the file, right ? export __GL_SYNC_TO_VBLANK=1 EDIT: No, not working. Last edited by ghaefb; 05-10-06 at 12:56 AM.

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