Difference between revisions of "UCM-iMX8M-Plus: Yocto Linux: Known Issues"

Latest revision as of 11:22, 23 February 2023

Suspend/Resume

Evaluation board can’t wake up after suspend if a PCIe device installed into the P9 socket

rtcwake -s 5 -m mem -d /dev/rtc0

Analog Audio Codec

Power on the board
Press a key to prevent a possible autoboot and get into the U-Boot command prompt
Use the following to set device tree that supports analog audio codec and start booting into Linux:

setenv fdtfile ucm-imx8m-plus-wm8731.dtb; boot

Wait for Linux prompt
Use cl-oselect to select alsa_output.platform-sound.analog-stereo output device
Try to reboot the device:

reboot

@@ Line 1: / Line 1: @@
+{{IssueCategory|Suspend/Resume|
+* Evaluation board can’t wake up after suspend if a PCIe device installed into the '''P9''' [[UCM-iMX8M-Plus:_Evaluation_Kit:_Getting_Started |socket]]
+:* '''How to reproduce:'''
+::* Install any PCIe device into the '''P9''' socket
+::* Power on the board
+::* Wait for Linux prompt
+::* Issue:
+::: <pre>rtcwake -s 5 -m mem -d /dev/rtc0</pre>
+:* '''Workaround:'''
+::* Leave the '''P9''' socket empty for suspend/resume evaluation
+}}
+{{IssueCategory|Analog Audio Codec|
+* System boot fails after using wm8731 codec
+:* '''How to reproduce:'''
+::* Power on the board
+::* Press a key to prevent a possible autoboot and get into the U-Boot command prompt
+::* Use the following to set device tree that supports analog audio codec and start booting into Linux:
+::: <pre>setenv fdtfile ucm-imx8m-plus-wm8731.dtb; boot</pre>
+::* Wait for Linux prompt
+::* Use [[UCM-iMX8M-Plus:_Yocto_Linux:_How-To_Guide#Switch_between_the_available_output|cl-oselect]] to select ''alsa_output.platform-sound.analog-stereo'' output device
+::* Try to reboot the device:
+::: <pre>reboot</pre>
+:* '''Workaround:'''
+::* Issue device power cycling
+::* Avoid using the ''ucm-imx8m-plus-wm8731.dtb'' device tree blob
+}}