I installed Debian Wheezy on my daughter's desktop computer. It has Intel i5-4570 (Haswell) CPU and integrated Intel HD 4600 graphics chipset. No discrete graphics card.I'm unable to enable 3D acceleration on the installed OS.How do I enable 3D acceleration on the machine that has Intel HD 4600 graphics chip?Below is some info that may be of interest:user1@desktop:~$ glxinfo|grep directdirect rendering: Yesuser1@desktop:~$ glxinfo|grep renderdirect rendering: YesOpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x209)GL_NV_conditional_render, GL_AMD_draw_buffers_blend,user1@desktop:~$ xdriinfoScreen 0: not direct rendering capable.When I remove the HDD from the desktop computer and put it into my wife's laptop computer and boot into Debian, it appears that 3D acceleration is enabled. The laptop computer has Intel i7-3612QM (Ivy-bridge) CPU and integrated Intel HD 4000 graphics chipset.Please have a look at the results:user2@laptop:~$ glxinfo|grep directdirect rendering: Yesuser2@laptop:~$ glxinfo|grep renderdirect rendering: YesOpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile     GL_NV_conditional_render, GL_ARB_ES2_compatibility, user2@laptop:~$ xdriinfoScreen 0: i965
Need help with enabling 3D acceleration in Debian stable
debian;3d