Bluetooth Gone After an Ubuntu Update? MediaTek MT7921 Kernel Crash Fix (HP EliteBook)
Bluetooth vanished after a big apt full-upgrade? Here’s how to confirm it’s a known MediaTek btmtk kernel crash (NULL pointer dereference in btmtk_setup_firmware_79xx) and fix it by switching to Ubuntu’s linux-oem kernel track.
Die Farbenblinden-Chroniken 18
Viel zu lange bin ich nicht über die Ampel gegangen. Heute brauchte ich einfach mal wieder eine ehrlichen Rotfahrer👍
Razer BlackWidow V4 Not Lighting Up on Ubuntu? Here’s the Permanent Fix
Update (1 September 2026): The original fix below covered cold boot, but the same bug can also show up after waking from suspend (e.g. running in clamshell mode with an external keyboard). Added a second hook for that case, plus a more robust way to target the device that survives USB re-enumeration — see “The same…
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