Revision as of 20:40, 13 May 2013

Release Notes

Following are features, updates, and known issues for this v1.4 release of the meta-intel layer of the Yocto Project.

LTSI Kernel: The v1.4 release is the 1st release for Yocto Project meta-intel BSPs which provides LTSI enabled (v3.4) Linux kernel recipes along with the default (v3.8.4) linux-yocto kernel recipes.

Emenlow BSP is been changed to use EMGD graphics driver stack instead of the earlier Poulsbo Graphics Driver Stack.

A new emenlow-noemgd BSP has been created which uses fully open source gma500 graphics driver stack.

A new nuc BSP has been created to support Intel’s Next Unit of Computing platforms.

For all the emgd based BSPs namely crownbay, emenow, fri2 & sys940x, the EMGD graphics driver stack has been upgraded from v1.14 to the latest, v1.16.

In the fri2-noemgd BSP, X is enabled for different supported hardware platforms, by using the fbdev X driver in place of the earlier vesa X driver.

The method of specifying BSP Video Acceleration configuration has been changed in this release. Instead of the VA_FEATURES variable a new variable named MACHINE_HWCODECS is used to specify which video codecs to include in the generated image.

For all the meta-Intel BSPs the Linux-yocto kernel (default kernel) is updated to v3.8.4.

New Linux-yocto-dev kernel recipes, which are used for development of the next kernel are now provided for these meta-intel BSPs: chiefriver, crownbay, crownbay-noemgd, emenlow, emenlow-noemgd, fri2, fri2-noemgd, jasperforest, nuc, sugarbay, sys940x, sys940x-noemgd

v3.4 of real time kernel recipes (linux-yocto-rt_v3.4) are now provided for these meta-intel BSPs: chiefriver, crownbay, crownbay-noemgd, crystalforest, emenlow, emenlow-noemgd, fri2, fri2-noemgd, jasperforest, n450, nuc, sugarbay, sys940x, sys940x-noemgd

v3.8 of real time kernel recipes (linux-yocto-rt_v3.8) is now provided for these meta-intel BSPs: chiefriver, crownbay, crownbay-noemgd, emenlow, emenlow-noemgd, fri2, fri2-noemgd, jasperforest, n450, nuc, sugarbay, sys940x, sys940x-noemgd

As part of the standard BSP retirement process, the cedartrail BSP has been retired from the Yocto Project as of this 1.4 release. Also note that the last, 1.3 version of the cedartrail BSP is still fully supported going forward.

[Bug #4180] USB devices auto disabling: On the Sugarbay platform, it is observed that some of the USB devices were getting automatically disabled within few seconds of inactivity. A workaround for this issue is: pass boot parameter usbcore.autosuspend=-1 to the kernel, which avoids this auto suspension. This issue is observed with the v3.8.4 kernel, and may also show on other hardware platforms.

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	== Known Issues ==		== Known Issues ==

	* USB devices auto disabling: On the Sugarbay platform, it is observed that some of the USB devices were getting automatically disabled within few seconds of inactivity. A workaround for this issue is: pass boot parameter usbcore.autosuspend=-1 to the kernel, which avoids this auto suspension. This issue is observed with the v3.8.4 kernel, and may also show on other hardware platforms.		* [Bug #4180] USB devices auto disabling: On the Sugarbay platform, it is observed that some of the USB devices were getting automatically disabled within few seconds of inactivity. A workaround for this issue is: pass boot parameter usbcore.autosuspend=-1 to the kernel, which avoids this auto suspension. This issue is observed with the v3.8.4 kernel, and may also show on other hardware platforms.