Since root-cause 1/4 and 2/4 (of the 4 known root causes, see previous comment) are fixed now I would like to focus on further researching root-cause 3/4.
If adding "pci=nocrs" as a workaround helps to get your touchpad working then please do the following: 1. Boot *without* "pci=nocrs" on the kernel commandline (you can e.g. use the edit option in the grub-menu and remove it from the commandline for 1 boot that way. Then run: "dmesg > dmesg.without-nocrs" in a terminal. 2. Boot with "pci=nocrs" on the kernel commandline and then run: "dmesg > dmesg.with-nocrs" in a terminal. 3. Try entering your BIOS setup screen, then select "load optimized defaults" and then "save-and-exit" and check if you still need the "pci=nocrs" workaround after this. Note do this after collecting the 2 dmesg files please. 4. Attach both dmesg files here, in combination with specifying the exact model of your laptop; and also specify if loading + saving the BIOS defaults helped or not. The goal here is to gather enough info about this problem to hopefully be able to come up with a workaround, e.g. automatically behave as if pci=nocrs is passed for devices where _CRS returns NULL or 0xffffffff as base-address. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1878279 Title: MSFT0004:00 06CB:CD98 Touchpad/trackpad mouse randomly not recognized from any given boot To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1878279/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
