[Bf-taskforce25] Weird nasty 2.5 bug

[Ton Roosendaal]

Hi,

If you use Intel graphics cards, make sure you disable "triple buffer" 
in the user preferences, and set it to "overlap".

Outliner -> header menu "User Prefs" -> "System and OpenGL"

Then save this config with CTRL+U as user pref.

I've discussed with Brecht to make "overlap" default for now. It's very 
disappointing to find out that Intel (and some ATIs) again fail to 
allow us to make a full crossplatform implementation for swap 
buffers... but I'll certainly meet with both vendors on Siggraph to get 
insight in what we can do to ensure a proper functioning UI.

-Ton-

------------------------------------------------------------------------
Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands

On 8 Jul, 2009, at 15:46, Xavier Thomas wrote:

> The strange thing here is that I never got that bug before
> aproximatively the 25th of june.
> I always build in debug, and got that bug after an svn up and I did
> not updated my system since may.
>
> This make me think that the bug was introduced by a change in blender
> code. (but can still be due to some X, mesa or driver issue)
> The bad thing is that I have no idea on how to debug this as after the
> crash I am unable to use gdb.
>
> xavier
>
>
> 2009/7/7 Jingyuan Huang <jingyuan.huang at gmail.com>:
>> I ran into that quite often in debug. Then I disabled hardware
>> acceleration and haven't encountered it so far.
>>
>> I'm not sure if it's a driver problem. It appears very often with my
>> ATI card, much less often with Nvidia (only once, and the system was
>> able to recover after a freeze. but I had to restart because the
>> graphics card was left in a bad state).
>>
>>
>> Best Wishes
>> Jingyuan Huang
>> ------------------------------------
>> Computer Graphics Lab
>> University of Waterloo
>>
>>
>>
>>
>> On Tue, Jul 7, 2009 at 11:01 AM, Xavier
>> Thomas<xavier.thomas.1980 at gmail.com> wrote:
>>> Hello,  mentioned it on IRC before disappearing but nobody replied, 
>>> so
>>> now that I am back I report it here.
>>>
>>> Since about 2 weeks I have got some kind of freezes, only the mouse
>>> cursor is still moving when I use the mouse but keyboard and mouse
>>> click does nothing. I am unable to switch to another app to a text
>>> console and even to reboot my system. Only an evil hardware shutdown
>>> will turn my system usable again (after reboot of course)
>>>
>>> To reproduce the bug I just need to click on a "tab" button of the
>>> button windows, it does not crash each time but 9 times out of 10
>>> here.
>>>
>>> I am on Debian squeeze GNU/Linux with intel GPU.
>>> _______________________________________________
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