Hi,
I started evaluating blender recently and I have been annoyed by a graphics related problem. I spent a few hours trying to resolve it by without success and decided to post here to get some guidance. I do not know where to look for a solution
Symptoms
Blender works perfectly with one exception: when I press ‘b’ on the keyboard to do a box selection the viewport is not redrawn is not redrawn anymore and the caret leaves traces on the screen like this:
click here for the full screenshot.
As you can see anything drawn on the viewport leaves a trail, including the KSnapShot logo that was bouncing when I launched it to take this screenshot.
As soon as I click on the viewport things go back to normal.
This behaviour makes it almost impossible to work as I have to select elements on the screen blindly.
I do not know whether this is a graphics driver problem, a DRI problem an OpenGL problem or a Blender problem! Please help me look in the right direction.
My system
P4 2.66Ghz
Intel E7205 chipset
1Gb of RAM
Radeon 9700Pro 128MB
My configuration
Gentoo Linux 2.6.23-r3
ATI open source driver (“radeon” kernel module)
Xorg 7.2
mesa 6.5.2-r1
Blender 2.45 (tested both compiled by portage an pre-compiled)
xorg.conf
Section “Device”
Identifier “ATI Radeon 9700 Pro”
Driver “radeon”
VideoRam 131072
# acceleration
Option "AGPMode" "8"
Option “AGPFastWrite” “yes” # crashes kernel
Option "EnablePageFlip" "on"
Option “RenderAccel” “on” not supported on 9700Pro
Option "AccelMethod" "XXA" # or EXA for composite
Option “BackingStore” “true”
Option “ExaNoOffscreenPixmaps”
# Color Tiling
Option "ColorTiling" "on"
EndSection
~/.drirc
<driconf>
<device screen=“0” driver=“r300”>
<application name=“Default”>
<option name=“force_s3tc_enable” value=“false” />
<option name=“no_rast” value=“false” />
<option name=“fthrottle_mode” value=“2” />
<option name=“tcl_mode” value=“3” />
<option name=“texture_depth” value=“0” />
<option name=“disable_s3tc” value=“false” />
<option name=“no_neg_lod_bias” value=“false” />
<option name=“command_buffer_size” value=“8” />
<option name=“round_mode” value=“0” />
<option name=“dither_mode” value=“0” />
<option name=“texture_coord_units” value=“8” />
<option name=“disable_lowimpact_fallback” value=“true” />
<option name=“texture_image_units” value=“8” />
<option name=“def_max_anisotropy” value=“1.0” />
<option name=“color_reduction” value=“1” />
<option name=“vblank_mode” value=“1” />
</application>
</device>
</driconf>
Thanks beforehand for your help.
~/jc