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

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

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
  • How to reproduce:
  • Install any PCIe device into the P9 socket
  • Power on the board
  • Wait for Linux prompt
  • Issue:
rtcwake -s 5 -m mem -d /dev/rtc0
  • Workaround:
  • Leave the P9 socket empty for suspend/resume evaluation
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:
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
  • Workaround:
  • Issue device power cycling
  • Avoid using the ucm-imx8m-plus-wm8731.dtb device tree blob