The system freezes randomly with kernel 3.2.45. I own a T430 (manufacturing date: 13/04 bios version: 2.54) with nvidia optimus. Both TwinView and Xinerama worked fine.įor T430 with Intel HD Graphics 4000 I experienced random screen freezes, that disappeared only after upgrading kernel to version 3.5 and Xorg driver to version 2.19. This was as of using driver version 290.10. To get the NVidia drivers working for Linux I had to set the Graphics Device to Discrete Graphics. The BIOS for the T420s (and presumably also the T420) settings for _Graphics Device_ default to NVIDIA Optimus and the OS Detection for NVIDIA Optimus is set to Disabled which is not a good set of defaults for Linux since Optimus is only supported by Windows 7. Note that XVideo (Xv) playback at certain frame sizes does not work properly unless you have at least version 2.12 of the Intel Xorg driver.ĭesktop Effects do not work in Ubuntu 10.10 (at least, on an X220). Linux distribution with kernel 2.6.33 and Intel Xorg driver 2.11 or newer is recommended. Kernel module driver supporting this card is i915, Xorg driver is xserver-xorg-video-intel. Windows seems to be able to switch between the GPUs, too. When using an HDMI/DP adapter the resolution was 1920x1200, may be because of the cheap adapter.Ĭontrary to the statement above, you can select the GPU in the BIOS of recent models with Nvidia Optimus, e.g. It was tested on Thnkpad T420 on Debian/Linux using DisplayPort socket/cable. Using High resolution external monitor is possible ( 4K/ 3840x2160) but slow. Sandy Bridge architecture processors use HD Graphics 2000 or HD Graphics 3000 model, Ivy Bridge architecture processors use HD Graphics 2500 or HD Graphics 4000. The Intel HD Graphics (sometimes also called GMA HD) is the Graphics Memory Accelerator (GMA) integrated in the Intel Core i3, Intel Core i5 and selected Intel Core i7 processors.
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