Re: [Chromium-dev] Re: [Chromium-users] Nvidia 3000G Support

[Brian P. <bri...@tu...>]

Chartrand Katharine N. wrote:
> I am running nvidia 3000gs with the 6591 driver and linux 2.4.26 and I 
> am not sure I have a swaplock or framelock problem.

Unless you explicitly set the proper Render SPU options for framelock, 
you're not using that facility.  And since I was never able to get the 
framelock feature to work here, I'm not sure the Render SPU code is up 
to snuff.


> Everything 
> seems to be in sync unless I have a very large data set in a particular 
> application (not running over chromium).  With this application, an image 
> on our multipanel display will be six inches out of alignment between 
> panels as we translate it quickly.

That sounds like ordinary network/Chromium latency.
The tilesort SPU sends geometry in round-robin order to the servers so 
there is some latency in the updates from one server to the next.


>  My hunch, however, was that the 
> problem was with  
> the application, not the cards because we see the same behavior with our 
> wildcats cards.  

Probably Chromium, not the application.


> This 6591 driver was given to us by nvidia to stop a combination of 
> problems: stereo flickering and chromium apps crashing, and it seems to 
> have fixed them both.  I don't believe it is a released driver, but I will 
> ask our nvidia contact if I can distribute it.  My questions are:
> 
> 1. can I have a copy of your test program so I can see if I have this 
> framelock problem (and don't know it!) with this 6591 driver.

Attached.  I've sent it to so many people I figured everyone had it by 
now. :)


> 2. what are the exact symptoms of this type of framelock, swaplock 
> problem. For example, would stereo work at all with this framelock problem 
> you describe.  Would you just get a flicker in the stereo? 

Stereo would probably "work" but the left/right synchronization among 
all the screens wouldn't occur.  It would confuse your eyes and maybe 
give you a headache after a while.

-Brian