Hi Kelvin, thank you for taking the time to report this issue.
There is a lot of information missing that would greatly aid in the
investigation of this issue, and trying to resolve it.
Can you please run "apport-collect 2077061" to collect and include more
logs, and system info? You can re-open the ticket once that is included
and I will pick up the investigation.
Also, what is the behaviour that you are expecting? It isn't clear to
me. The server does not have a CXL device attached, and it fails to
load CXL support. There are other messages in the log about ACPI is not
supporting/detecting some CXL features.
Do you expect the cxl code not to try to initialize, or do you expect it
to succeed without any warnings?
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Philip Cox (philcox)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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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
Status in linux package in Ubuntu:
Incomplete
Bug description:
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.
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