[Bf-taskforce25] Weird nasty 2.5 bug

[Xavier Thomas]

Hi,

I already tried the "overlap" redraw as soon as I noticed the bug
(some weeks ago)

I also tried to identify which commit introduced this issue, but after
reverting/compiling a lot of svn revision I just reallised that the
bug only happen when I launch blender inside gdb. Even a debug build
will not crash if run normally (not in gdb). So I just lost my time
and will retry later when I have some time.

Or maybe this is due to some gdb issue.

xavier



2009/7/9 Ton Roosendaal <ton at blender.org>:
> 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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