Bug 11699

Summary: i915tex_dri.so vs. i915_dri.so: further away objects vanishing in "fog"
Product: Mesa Reporter: Jens Stroebel <dr-xorg>
Component: Drivers/DRI/i915Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED WONTFIX QA Contact:
Severity: normal    
Priority: medium CC: sergio
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
URL: http://www.bcsoft.de/xorg/intel/fog_example.html
Whiteboard:
i915 platform: i915 features:

Description Jens Stroebel 2007-07-23 08:03:16 UTC 
We're experiencing an unwanted display behavior with the intel driver
and the corresponding i915tex_dri.so DRI driver:

When an object in our example application is looked at from close by,
the optical appearance is quite as it should be; with growing "distance"
from the object, it seems to disappear in some kind of "fog".

As I don't think I can describe this very good, I put example
screenshots of the effect on the following page:
   http://www.bcsoft.de/xorg/intel/fog_example.html

The effect does not appear when using the option
"Legacy3D" "true" , so it seems to be related to the i915tex_dri.so DRI
driver.

Used components:

xserver git from 2007-06-19
xf86-video-intel git from 2007-07-12
drm git from 2007-07-12
MesaLib git from 2007-07-13
xorg-libs from 2007-07-12
Comment 1 Jens Stroebel 2007-07-23 08:11:57 UTC 
lspci|grep VGA:
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)
Comment 2 Jens Stroebel 2007-07-25 06:45:58 UTC 
additional info:

this effect only happens to objects with "mipmap"-ed textures, I was told.
it was still present with Mesa git from 2007-07-24
Comment 3 Michael Fu 2007-12-03 17:03:16 UTC 
i915tex is gone. would you please test on the git upstream to see if your issue still exist? If yes, please open another bug to track, and I'll mark this bug as wontfix... thanks.

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