Hi all, I have tried to open Chimera on Ubuntu 12.04 LTS system, which is installed under Win7 system through VirtualBox. The graphic card is from Nvidia company. And I've got below error: abc@ubuntu:~$ chimera X Error of failed request: BadDrawable (invalid Pixmap or Window parameter) Major opcode of failed request: 72 (X_PutImage) Resource id in failed request: 0x480006c Serial number of failed request: 1444 Current serial number in output stream: 1450 Then I tried "chimera --debug-opengl", after I disable all OpenGL features, still it didn't work. Here is the OpenGL information generated by "Chimera Debug Graphics Driver" interface: OpenGL information: Vendor: VMware, Inc. Renderer: Gallium 0.4 on llvmpipe(LLVM 0x300) Version: 2.1 Mesa 8.0.2 OS: Linux 3.2.0-23-generic x86_64 I have seen a previous post "answerpot.com/showthread.php?4472311-Chimera+on+a+virtualbox", which asked a similar question. Can this problem be solved? Thanks in advance! Lingyu