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|Processor||AMD Fusion APU A6-3400M/A4-3300M Processor|
|Screen||15.6“ 1366×768 Widescreen|
|RAM||Up to 8GB|
|HDD||Up to 750GB|
|Graphics||AMD Radeon HD 6650M
AMD Radeon HD 6720G2
|Processor||Works||Can be overclocked|
|Screen||Works||Use linux >= 3.19.2 for proper operation after suspend/resume|
|Optical Drive||Not Tested|
|Graphics Chip||Works, with problems||Open source driver works best with kernel>=3.11 and Mesa>=10.0|
|VGA Out||Works, with problems|
|HDMI Out||Works, with problems|
|Built-in Microphone||Works||Mic is sensitive, lower volume for use in VoIP programs|
|Microphone Jack||Not Tested|
|Wireless||Works, with problems|
|Suspend/Resume||Works, with problems||Laptop panel blank on resume - external displays work fine (update: Fixed with linux >= 3.19.2). For kernel>=3.13.*, GPU hangs on suspend, resume and shutdown|
You can install and use the proprietary AMD Catalyst drivers, where the problems with the open source driver may not occur.
Versions that work well: (14.2 beta)
(Version 12.3 seems to work quite well, with very good performance as well)
This section details the open source GPU driver's problems and workarounds.
Use following kernel parameters for good stable use.
Recommend using Linux kernel >= 3.11 - proper power management resulting in better performance and lower temperatures. Requires AMD GPU firmware as well, should be included in distribution's Linux firmware package.
All firmware can be found here: http://people.freedesktop.org/~agd5f/radeon_ucode/
For Linux kernel >= 3.13 , GPU hangs during suspend, resume and shutdown. As a temporary workaround, boot with kernel parameter radeon.runpm=0. This will turn off the runtime power management that automatically shuts off the dedicated GPU (if present) when unused. It does not affect dpm (the new power management code).
Related bug report: https://bugs.freedesktop.org/show_bug.cgi?id=75127
Laptop screen is blank (backlight off) after suspending and resuming when using the open source driver.
Workaround: Use kernel parameter acpi_sleep=s3_bios
Update: This has now been fixed upstream in the Linux kernel! See Freedesktop bugzilla link above for details and patch.
Linux 3.19.2 kernel (and later) now carries this patch!
Glamor uses OpenGL for 2D acceleration instead of DDX (xf86-video-ati). Might be faster, especially with enhancements to Glamor in X.Org 1.16
Glamor 2D acceleration may not work properly - in any case, it is optional and by default EXA is used.
Might increase OpenGL performance significantly.
Can enable HyperZ support by setting this environment variable: R600_DEBUG=hyperz
You can use the command 'export R600_DEBUG=hyperz' in the terminal, and then launch programs from the same terminal. The launched program will use HyperZ for OpenGL drawing.
Update: This should now be enabled by default as of Mesa 10.4/10.5
With the open source driver, the dedicated GPU is not currently used. You can try using it by running the following commands:
Can check with glxinfo after 2nd command - should say TURKS instead of SUMO
Apparently, compositing needs to be turned on for this to work (the special effects that desktop environments/window managers use) - otherwise the window is just blank. Can be buggy and only works well for some software.
There are some changes in newer X.Org/DRI/DRM versions to fix bugs with this feature, and enable it even if compositing is not used. These should be available in X.Org 1.16
Overall works well when using latest stable software.