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$ sudo apport-collect 2119086 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2119086 Title: [Regression] Realtek RTL8852CE Wi-Fi not working after kernel update to 6.14.0-27-generic Status in linux package in Ubuntu: Incomplete Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2119086/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
