Public bug reported:
Ubuntu 24.04 showed CXL related complaining messages (when CXL root port
did not attach CXL device) such as below messages (refer to attached
dmesg file):
Couldn't locate the CXL.cache and CXL.mem capability array header.
HDM decoder capability not found
For more details, Please refer to the attached dmesg file
How reproducible:
100%
Steps to reproduce
1. Install Ubuntu 24.04 on a Lenovo server which is CXL enabled by Intel
CPU and Lenovo UEFI, but there is no CXL device attached in this server.
2. Check the dmesg.
3. The above error messages are seen in the dmesg file.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "dmesg with CXL complaining messages"
https://bugs.launchpad.net/bugs/2077061/+attachment/5806004/+files/dmesg_ubuntu2404.txt
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https://bugs.launchpad.net/bugs/2077061
Title:
Ubuntu 24.04 showed CXL related complaining messages when CXL capable
root port did not attach CXL device
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