[Openchrome-users] Scrambeld screens in Ubuntu 7.10 with VN800

[John W. Eby]

I found the Option "EnableAGPDMA" "false" in the list archives.
Turning off DMA stops the screen corruption.
I am also using Option "SWCursor" "true" to keep my mouse from 
disappearing in some applications.
Overall the driver is working and am getting 3D direct rendering. All 
the GL Screen savers run great.
2D working much better than the vesa driver.
Shared this info on the Ubuntu Forums,  its workings for folks there too.
Thanks.

Andrey Melentyev wrote:
> It seems that I have the same trouble with my VN800. I've described it
> some time ago here:
> http://wiki.openchrome.org/pipermail/openchrome-users/2007-October/003677.html
>
> And setting Option "EnableAGPDMA" "false" works for me, now I have no
> screen corruptions. The other way that I've found that helps is to
> completely disable DRI. While we can't do it in a gentle way with
> --disable-dri ./configure switch (
> http://www.openchrome.org/trac/ticket/137 ) we still can delete DRM
> modules or do some other dirty hack.
>
> But I hope that openChrome developers will fix this bug soon. As far
> as I can see, this troubles began since merging experimental branch
> with trunk. I can reproduce this bad behavior on 0.2.900 and on
> current SVN trunk.
>
>
> On 10/31/07, John Eby <jweby at sbcglobal.net> wrote:
>   
>> I compiled and installed the openchrome driver from svn, revision 425, using
>> the openchrome.sh script found in the Ubuntu Forums on a fresh install of
>> Ubuntu 7.10.
>>
>> The openchrome.sh script is great. Compiles the driver and modifies
>> xorg.conf to use the driver. X starts up using the openchrome driver.
>>
>> The display OK for a bit and starts to scramble.
>>
>> Its almost as if old screen memory is getting switched in that shows a
>> history of the cursor locations and window positions. For example, If I drag
>> a dialog box across the screen. It will land and position fine, but I will
>> eventually get a screen that shows its trails. Windows and dialog box
>> contents and items on the ubuntu menu bars disappear. Have to cursor over,
>> click on them or resize the windows to get items to redraw.
>>
>>  This is on an Everex StepNote NC1500 (VN800+VT8237) with a Via C7-M 1500
>> Eden Processor.
>>
>> Any help or Ideas are appreciated.
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
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>> openchrome-users at openchrome.org
>> http://wiki.openchrome.org/mailman/listinfo/openchrome-users
>> Main page:
>> http://www.openchrome.org
>> Wiki:
>> http://wiki.openchrome.org
>> User Forum:
>> http://wiki.openchrome.org/tikiwiki/tiki-view_forum.php?forumId=1
>>
>>     
>
>
>