Public bug reported:
After upgrading to kernel 6.14.0-27-generic, my Realtek RTL8852CE Wi-Fi
adapter is no longer detected by Ubuntu. This issue did not occur in
6.14.0-24-generic, where the device worked without issue using the
rtw89pci driver. This indicates a likely regression or misconfiguration
introduced in 6.14.0-27.
System Information:
Ubuntu version: 24.04.2 LTS
Kernel (working): 6.14.0-24-generic
Kernel (broken): 6.14.0-27-generic
Wi-Fi device: Realtek RTL8852CE (PCIe)
Driver in use: rtw89pci
Laptop: Lenovo Legion Pro 5 16ARX8
Steps to Reproduce:
Boot into 6.14.0-27-generic
Wi-Fi adapter is not detected at all (no wlan0 / wlp... interfaces)
Run lspci → Realtek Wi-Fi controller is present
Run lsmod → rtw89pci not loaded
Run dmesg → no trace of Wi-Fi driver activity
Boot into 6.14.0-24-generic
Wi-Fi works correctly again
Expected Behavior:
Wi-Fi adapter should be detected and initialized automatically on boot, as in
earlier kernel versions.
Actual Behavior:
No Wi-Fi interface is present.
No driver is loaded (lsmod | grep rtw → empty).
dmesg shows no driver probe attempt or related firmware issue.
Logs:
lspci (device is physically present):
```
04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8852CE 802.11ax
Wireless Network Controller (rev 01)
```
===============================================
uname -r:
Working: 6.14.0-24-generic
Broken: 6.14.0-27-generic
===============================================
lsmod | grep rtw:
Working:
```
rtw89_8852ce 12288 0
rtw89_8852c 983040 1 rtw89_8852ce
rtw89_pci 102400 1 rtw89_8852ce
rtw89_core 1056768 2 rtw89_pci,rtw89_8852c
mac80211 1814528 2 rtw89_core,rtw89_pci
cfg80211 1433600 3 rtw89_core,mac80211,rtw89_8852c
```
Broken: nothing
===============================================
dmesg | grep -i rtw:
Working: empty
Broken: empty
===============================================
Workaround:
Booting into the previous kernel (6.14.0-24-generic) restores Wi-Fi
functionality. Wi-Fi is stable and consistent in that version.
Additional Observations:
* A similar issue occurred previously after upgrading to NVIDIA proprietary
driver v570 (from v550). Wi-Fi disappeared under similar conditions, which was
resolved by reverting either the kernel or the GPU driver.
* This suggests the possibility of a PCI or ACPI-related regression
affecting multiple subsystems (GPU and Wi-Fi).
Suggestion:
Please check whether linux-image-6.14.0-27-generic lacks:
* Proper support for Realtek RTL8852CE (e.g. missing rtw89 module)
* Related firmware blobs
* Or has introduced changes in ACPI/PCI probing logic that prevents the Wi-Fi
adapter from being initialized
If relevant, restoring or updating rtw89 support via DKMS or packaging
may be necessary.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2119086
Title:
[Regression] Realtek RTL8852CE Wi-Fi not working after kernel update
to 6.14.0-27-generic
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2119086/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
