'Ideapad S145 Touchpad' not working at all. Not even detected after a fresh Ubuntu 20.10 install.

[Netto]

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

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

[ 1.843219] intel-lpss: probe of 0000:00:15.0 failed with error -16

Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.12-rc8/amd64/

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[Hui Wang (hui.wang)]

Please test this kernel and upload the dmesg ($dmesg > dmesg.txt): https://people.canonical.com/~hwang4/lp1921649/

thx.

[Netto (rcnetto)]

I was not able to use the suggested kernel due to UEFI/SecureBoot. However, after edit "/etc/default/grub" and change GRUB_CMDLINE_LINUX_DEFAULT to GRUB_CMDLINE_LINUX_DEFAULT="quiet i8042.nopnp=1 pci=nocrs", touchpad started to work.

OBS: Suggestion taken from: https://askubuntu.com/questions/1220264/lenovo-ideapad-s145-touchpad-not-working

[Hans de Goede (j-w-r-degoede)]

Sorry that it is taking so long to fix this. There have been several attempts at fixing this upstream already, but all of them had to be reverted/dropped because they were causing issues on other laptop models.

The latest attempt at fixing this is here:
https://<email address hidden>/

And this patch, or something close to it will hopefully go upstream soon.

Perhaps one of the Ubuntu kernel devs can provide a test kernel with this patch for Ubuntu users with this problem to test?

[Kai-Heng Feng (kaihengfeng)]

Test kernel can be found here:
https://people.canonical.com/~khfeng/lp1932069/

[Bjorn Helgaas (bjorn-helgaas)]

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.