Bug 2054130 - HDMI-Adapter can't hold connection
Summary: HDMI-Adapter can't hold connection
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 35
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2022-02-14 09:09 UTC by fred99schenk
Modified: 2022-12-13 16:39 UTC (History)
19 users (show)

Fixed In Version:
Doc Type: ---
Doc Text:
Clone Of:
Last Closed: 2022-12-13 16:39:07 UTC
Type: Bug

Attachments (Terms of Use)
Kernel log from current boot (102.36 KB, text/plain)
2022-02-14 09:09 UTC, fred99schenk
no flags Details

Description fred99schenk 2022-02-14 09:09:16 UTC
Created attachment 1860937 [details]
Kernel log from current boot

1. Please describe the problem:

On my laptop, a Lenovo IdeaPad 720s 15IKB, when I try to connect an external monitor with an USB-C to HDMI adapter, it connects, shows briefly an image, then "forgetting" that it has an monitor attached, which makes it not usable.

2. What is the Version-Release number of the kernel:


3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

Up until the 5.15.14 kernel it could hold the connection when you plugged in the adapter the first time after booting, only failing after unplugging and attempting to plug it back in.

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

The issue is can be reproduce on my laptop, but be aware that it does not affect the other laptop I have around when using the same HDMI-Adapter, so I think it's specific to this model.

6. Are you running any modules that not shipped with directly Fedora's kernel?:

No additional modules are used.

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

See attachments for a kernel log from the current boot.

See also the following discussion on ask.fedoraproject.org for a video file showing the issue as well as some logs I created before (listing of the attached adapter and events that were logged while the adapter was connected).


Comment 1 Ben Cotton 2022-11-29 17:53:08 UTC
This message is a reminder that Fedora Linux 35 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 35 on 2022-12-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '35'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, change the 'version' 
to a later Fedora Linux version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora Linux 35 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora Linux, you are encouraged to change the 'version' to a later version
prior to this bug being closed.

Comment 2 Ben Cotton 2022-12-13 16:39:07 UTC
Fedora Linux 35 entered end-of-life (EOL) status on 2022-12-13.

Fedora Linux 35 is no longer maintained, which means that it
will not receive any further security or bug fix updates. As a result we
are closing this bug.

If you can reproduce this bug against a currently maintained version of Fedora Linux
please feel free to reopen this bug against that version. Note that the version
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