This is likely a duplicate of https://bugs.launchpad.net/bugs/1878279
The current upstream resolution to this problem is https://git.kernel.org/linus/d341838d776a ("x86/PCI: Disable E820 reserved region clipping via quirks"), which relies on quirks that match DMI Vendor, Product Version, Product Name, and Board Name. This isn't an ideal solution because there are likely other systems we don't know about that need a similar fix. The patch I'm attaching here is an experimental idea to work around this issue without the maintenance burden of the quirks. If anybody would be willing to test this patch, I would be very grateful. To test it, apply this patch to your kernel, boot with "pci=use_e820 efi=debug", and collect the dmesg log. ** Attachment added: "experimental patch to remove EfiMemoryMappedIO" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1921649/+attachment/5632130/+files/remove-mmio -- 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/1921649 Title: 'Ideapad S145 Touchpad' not working at all. Not even detected after a fresh Ubuntu 20.10 install. Status in linux package in Ubuntu: Expired Bug description: Just installed Ubuntu 20.10 in a new Lenovo Ideapad S145 82DJ0000BR and touchpad does not work. It's not detected as seen here: $ xinput list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Integrated Camera: Integrated C id=10 [slave keyboard (3)] ↳ Ideapad extra buttons id=11 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)] ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: linux-image-5.8.0-48-generic 5.8.0-48.54 ProcVersionSignature: Ubuntu 5.8.0-48.54-generic 5.8.18 Uname: Linux 5.8.0-48-generic x86_64 ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: netto 1359 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun Mar 28 17:30:14 2021 InstallationDate: Installed on 2021-03-20 (7 days ago) InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 174f:1176 Syntek Integrated Camera Bus 001 Device 002: ID 0461:4d51 Primax Electronics, Ltd 0Y357C PMX-MMOCZUL (B) [Dell Laser Mouse] Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak (JfP) Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 82DJ ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-48-generic root=UUID=8f45bc43-cd22-4cfa-83ee-4cb09fd58f0c ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.8.0-48-generic N/A linux-backports-modules-5.8.0-48-generic N/A linux-firmware 1.190.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/22/2020 dmi.bios.release: 1.48 dmi.bios.vendor: LENOVO dmi.bios.version: DKCN48WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40688 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo IdeaPad S145-15IIL dmi.ec.firmware.release: 1.48 dmi.modalias: dmi:bvnLENOVO:bvrDKCN48WW:bd07/22/2020:br1.48:efr1.48:svnLENOVO:pn82DJ:pvrLenovoIdeaPadS145-15IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40688WIN:cvnLENOVO:ct10:cvrLenovoIdeaPadS145-15IIL: dmi.product.family: IdeaPad S145-15IIL dmi.product.name: 82DJ dmi.product.sku: LENOVO_MT_82DJ_BU_idea_FM_IdeaPad S145-15IIL dmi.product.version: Lenovo IdeaPad S145-15IIL dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1921649/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
