I used to have decent performance with Google Earth (GE) on Hardy, but after the upgrade to Intrepid I am having issues with rendering as well. Everything seems fine, but whenever I try to run GE or World Wind Java I get this single error message in /var/log/Xorg.0.log (EE) intel(0): underrun on pipe B!
Below are additional outputs that I can think of... These are on a Lenovo 3000 v100 laptop. $ lspci |grep gra 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) $ glxgears -info GL_RENDERER = Mesa DRI Intel(R) 945GM 20061102 x86/MMX/SSE2 GL_VERSION = 1.4 Mesa 7.2 GL_VENDOR = Tungsten Graphics, Inc GL_EXTENSIONS = GL_ARB_depth_texture... GL_SUN_multi_draw_arrays 4161 frames in 5.0 seconds = 832.134 FPS 5007 frames in 5.0 seconds = 1001.400 FPS 4988 frames in 5.0 seconds = 997.439 FPS 4944 frames in 5.0 seconds = 988.700 FPS I notice that even though DRI is enabled my CPU usage goes to 75% on one core when the GLXGears is running. When the window is behind another window rates go up to ~3200 FPS or 16000 frames over 5 sec. I don't recall these behaviors in Hardy. $ glxinfo | grep render direct rendering: Yes OpenGL renderer string: Mesa DRI Intel(R) 945GM 20061102 x86/MMX/SSE2 In HARDY glxinfo would give me a different date for MESA: direct rendering: Yes OpenGL renderer string: Mesa DRI Intel(R) 945GM 20061017 x86/MMX/SSE2 May be MESA might have something to do with this? I used to have flicker problems on Hardy when I run GE with Compiz, so I keep my compiz turned off. Though I tested to see if it was working and I don't seem to have problems with wobbly windows etc. They seem to work OK. Performance difference with/without DRI on Hardy was 6000/4000 frames with GLX gears and that made a huge difference in GE. Just for the record, afaik GE needs SSE2 as well, and it is supported on the laptop. $ cat /proc/cpuinfo | grep sse2 -o sse2 sse2 In general the performance is OK, but seems like something went wrong with the 3D drivers... I hope the "buffer underrun" message in Xorg.log or the date difference in MESA drivers can give someone an idea to fix this. -- Poor graphics performance and rendering errors on Intel GM965 system, Ubuntu 8.10 https://bugs.launchpad.net/bugs/252094 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
