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PHYTEC Known Issues
- IMX7SW-420: Using Java/Node.js with Greengrass:
- The Java 8 and Node.js v6.10 packages can't be found by Greengrass with their current package names. Link them to files with the correct names:
ln -s /usr/bin/node /usr/bin/nodejs6.10ln -s /usr/bin/java /usr/bin/java8
- The Java 8 and Node.js v6.10 packages can't be found by Greengrass with their current package names. Link them to files with the correct names:
- Ethernet:
- iperf3 is included with the Morty Yocto BSP. With UDP, this command reports much lower bandwidth than expected when compared with iperf command.
eMMC:
- Flashing with U-Boot:
- fsl-image-validation-imx-imx7d-phyboard-zeta-001.sdcard image is too large to be loaded into memory (1GB) from u-boot.
- Workaround: Partition and flash eMMC from Linux instead. See Quickstart for instructions.
- IMX7SW-205: HS400 warnings/errors: configure eMMC to run at maximum 100MHz as a work around. See commit b8f6c1b7780 for more information
- Flashing with U-Boot:
- Linux IMX Busfreq driver:
- Driver disabled by default due to impaired UART console functionality when the system is idle (Low frequency setpoint).
For dynamic bus frequency scaling and improved power consumption, the busfreq driver can be enabled in the device tree by removing the "fsl,freq_scaling_disabled" property in imx7-phycore-som.dtsi. It can also be controlled in Linux sysfs:
echo 1 > /sys/bus/platform/drivers/imx_busfreq/soc\:busfreq/enable
- NAND:
- 256MB NAND is too small to flash fsl-image-validation-imx filesystem. Booting from NAND was tested with core-image-minimal Yocto image, which is included with release binaries.
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