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Bug#611803: libdrm-radeon1: ..a tarred ('n ready for the feathers?) "camouflage" shade animation every frame in flightgear-2.0.0-2 'n -3

Package: libdrm-radeon1
Version: 2.4.23-1
Severity: important

...this bug is not seen by flightgear developers using Nvidia GPUs or Nvidia drivers,
I'm only aware of it being visible with ATI Radeon GPU and xserver-xorg-video-radeon 
1:6.13.2-1 and flightgear 2.0.0-x and flightgear2.2-git, flightgear 1.9.1-x was fine.

...this bug was first reported upstream as 
and in Debian as #611685, as nobody else has reproduced this,
flightgear developers suspect this maybe a radeon or DRI bug.

...these 2 screenshots shows 2 of at least 4 different 
German WWI-style printed camouflage canvas on FG's 
default C172P, these change every frame in FG-2.0.0-2,
but not in -3, so there is an improvement, but it is 
flying blindly, only the spitfireIX in FG-2.2|git 
still has the flickering.

...hw:laptop, Fujitsu-Siemens Celsius H240 w T7200 cpu, 
4GB memory and ATI RV530 on Debian Sid/Experimental 
radeon driver,  on Debian Sid's latest flightgear,
will add output of any debug output idea, here in

...screen shots, lshw, X logs etc in:

...missed (by reportbug) system info:
arnt@celsius:~/github.com/flightgearthings$ dpkg -l |grep radeon
ii  libdrm-radeon1                                       2.4.23-1                          Userspace interface to radeon-specific kernel DRM services -- runtime
ii  radeontool                                           1.6.1-1                           utility to control ATI Radeon backlight functions on laptops
ii  xserver-xorg-video-radeon                            1:6.13.2-1                        X.Org X server -- AMD/ATI Radeon display driver

(ii  xserver-xorg-video-radeonhd                          1.3.0-4                           X.Org X server -- AMD/ATI r5xx-r7xx alternate display driver
to try reproduce with that driver, requires unsetting kms and a reboot, and before that happens, a new bios battery.)
arnt@celsius:~/github.com/flightgearthings$ dpkg -l |grep xorg
ii  transset-df                                          6-1                               support on-the-fly transparency changing in xorg
ii  xorg                                                 1:7.6~2                           X.Org X Window System
ii  xorg-docs-core                                       1:1.6-1                           Core documentation for the X.org X Window System
ii  xserver-xorg                                         1:7.6~2                           the X.Org X server
ii  xserver-xorg-core                                    2:                     Xorg X server - core server
ii  xserver-xorg-input-acecad                            1:1.4.0-3                         X.Org X server -- AceCad input driver
ii  xserver-xorg-input-aiptek                            1:1.3.1-1                         X.Org X server -- Aiptek input driver
ii  xserver-xorg-input-elographics                       1:1.2.4-1                         X.Org X server -- ELOGraphics input driver
ii  xserver-xorg-input-evdev                             1:2.6.0-1                         X.Org X server -- evdev input driver
ii  xserver-xorg-input-joystick                          1:1.5.0-6                         X.Org X server -- joystick input driver
ii  xserver-xorg-input-mouse                             1:1.6.0-1                         X.Org X server -- mouse input driver
ii  xserver-xorg-input-penmount                          1:1.4.1-3                         X.Org X server -- Penmount input driver
ii  xserver-xorg-input-synaptics                         1.3.0-1                           Synaptics TouchPad driver for X.Org server
ii  xserver-xorg-input-vmmouse                           1:                   X.Org X server -- VMMouse input driver to use with VMWare
ii  xserver-xorg-input-void                              1:1.3.1-1                         X.Org X server -- void input driver
ii  xserver-xorg-video-dummy                             1:0.3.4-1                         X.Org X server -- dummy display driver
ii  xserver-xorg-video-fbdev                             1:0.4.2-3                         X.Org X server -- fbdev display driver
ii  xserver-xorg-video-ivtv                              1.1.1-3                           X.Org X server -- IVTV display driver
ii  xserver-xorg-video-radeon                            1:6.13.2-1                        X.Org X server -- AMD/ATI Radeon display driver
ii  xserver-xorg-video-radeonhd                          1.3.0-4                           X.Org X server -- AMD/ATI r5xx-r7xx alternate display driver
ii  xserver-xorg-video-rendition                         1:4.2.4-1                         X.Org X server -- Rendition display driver
ii  xserver-xorg-video-sisusb                            1:0.9.4-1                         X.Org X server -- SiS USB display driver
ii  xserver-xorg-video-v4l                               1:0.2.0-5                         X.Org X server -- Video 4 Linux display driver
ii  xserver-xorg-video-vmware                            1:11.0.3-1                        X.Org X server -- VMware display driver

-- System Information:
Debian Release: 6.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.37-trunk-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages libdrm-radeon1 depends on:
ii  libc6                         2.11.2-11  Embedded GNU C Library: Shared lib
ii  libdrm2                       2.4.23-1   Userspace interface to kernel DRM 

libdrm-radeon1 recommends no packages.

libdrm-radeon1 suggests no packages.

-- no debconf information

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