I'm using Debian 8, but my integrated graphics card does not seem to be used.
This is on an Asus Zenbook UX303 which uses HD 5500 integrated graphics:
$ sudo lspci -vnn | grep VGA -A 12 00:02.0 VGA compatible controller : Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:183d] Flags: bus master, fast devsel, latency 0, IRQ 64 Memory at f6000000 (64-bit, non-prefetchable) [size=16M] Memory at e0000000 (64-bit, prefetchable) [size=256M] I/O ports at f000 [size=64] Expansion ROM at <unassigned> [disabled] Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915
It seems to say there is a driver in use, however, it doesn't seem the machine is actually using that graphics card:
$ glxinfo | grep OpenGL OpenGL vendor string: VMware, Inc. OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.5, 256 bits) OpenGL version string: 3.0 Mesa 10.3.2 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions:
How do I get debian to actually use the integrated graphics card?
$ uname -a Linux zenbook 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-3~deb8u1 (2015-04-24) x86_64 GNU/Linux
I've also tried the 4.0.2 kernel from unstable, which doesn't change anything; uname:
$ uname -a Linux zenbook 4.0.0-1-amd64 #1 SMP Debian 4.0.2-1 (2015-05-11) x86_64 GNU/Linux