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System Controller Hub (SCH) is a family ofIntelmicrochips employed inchipsets for low-powerAtom-based platforms. Its architecture is consistent with theIntel Hub Architecture but combines the traditionalnorthbridge andsouthbridge functions into a singlemicrochip.
Poulsbo is the codename of the first SCH and plays a key role inIntel's second-generationMenlowUMPC andMID platform chipset forAtomSilverthorne microprocessors.[1][2]
The graphics core is calledGMA 500 and unlike most graphics cores used by Intel was developed byImagination Technologies. Intel licensed thePowerVR SGX 535 as a graphics core and the PowerVR VXD370 forH.264/MPEG-4 AVC playback. The video core is able to process720p as well as1080i resolutions.[3]
This has the following variations:[4]
Although severalnetbooks using the Poulsbo chipset are shipped with some distribution ofLinux (notably theSony Vaio P andDell Inspiron Mini 12, among others), Poulsbo's graphics core GMA 500 is currently not well supported by Intel for Linux.
A proprietary driver was shipped with Dell's adaptation ofUbuntu 8.04.1 Netbook Remix, which provides 2D hardware acceleration (although users reported serious stability issues[5]) under Linux kernel 2.6.24.A work-in-progress free driver is currently available, however the proprietary driver does not work with current Linux kernels and current versions of X.[6] Work is under way to provide at least 2D support in current Linux kernels,[7] although this will still rely on proprietary binary code for the 3D part of the driver. The current[8] status of this driver runs on Fedora 10 and allows for 2D. 3D acceleration, however, is still broken.
A working, proprietary driver package is available for Fedora 11.[9]
Starting with Mandriva 2010 Release Candidate 2, Poulsbo drivers are now fully supported out of the box when you use One isos. Hardware will be automatically detected and configured using XFdrake. As it needs non-free firmware, this could not be included in Free isos.[10]
A rudimentary (no 3D acceleration) driver was added to Linux 2.6.39.[11][12]
Whitmore Lake is the codename of another SCH.
This has the following variations:[13]