** Tags removed: disco

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https://bugs.launchpad.net/bugs/1827694

Title:
  Synaptics Touchpad doesn't support scroll after update to 19.04

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have Lenovo P50 laptop. After upgrading to 19.04 from 18.10
  Synaptics touchpad no longer supports scrolling after boot. It is also
  not detected in 'mouse' settings.

  After some research I found that running 'echo -n "reconnect" | sudo
  tee /sys/bus/serio/devices/serio1/drvctl' seems to fix the problem.

  Relevant info in dmesg:

  ```
  $ dmesg | grep -E 'psmouse|i801'
  [    2.101685] i801_smbus 0000:00:1f.4: enabling device (0000 -> 0003)
  [    2.101805] i801_smbus 0000:00:1f.4: SPD Write Disable is set
  [    2.101913] i801_smbus 0000:00:1f.4: SMBus using PCI interrupt
  [    2.871715] psmouse serio1: synaptics: queried max coordinates: x 
[..5676], y [..4754]
  [    2.905193] psmouse serio1: synaptics: queried min coordinates: x 
[1266..], y [1100..]
  [    2.905195] psmouse serio1: synaptics: Trying to set up SMBus access
  [    3.109019] i801_smbus 0000:00:1f.4: Timeout waiting for interrupt!
  [    3.109020] i801_smbus 0000:00:1f.4: Transaction timeout
  [    3.111086] psmouse serio1: synaptics: SMbus companion is not ready yet
  [    3.112781] psmouse serio1: synaptics: Unable to initialize device.
  ```

  This is a regression from 18.10 (and all versions before that that
  I've run on this laptop).

  Please let me know if more information is needed. Thanks.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-13-generic 5.0.0-13.14
  ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
  Uname: Linux 5.0.0-13-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.10-0ubuntu27
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC3:  kolya      3390 F.... pulseaudio
   /dev/snd/controlC2:  kolya      3390 F.... pulseaudio
   /dev/snd/controlC1:  kolya      3390 F.... pulseaudio
   /dev/snd/controlC0:  kolya      3390 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Sat May  4 00:17:32 2019
  InstallationDate: Installed on 2016-02-20 (1168 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Release amd64 
(20151021)
  MachineType: LENOVO 20EN001SUS
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-13-generic 
root=/dev/mapper/ubuntu-root ro rootflags=subvol=@ cgroup_enable=memory 
swapaccount=1 quiet splash vt.handoff=1
  RelatedPackageVersions:
   linux-restricted-modules-5.0.0-13-generic N/A
   linux-backports-modules-5.0.0-13-generic  N/A
   linux-firmware                            1.178
  SourcePackage: linux
  UpgradeStatus: Upgraded to disco on 2019-05-02 (1 days ago)
  dmi.bios.date: 11/14/2018
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1EET81W (1.54 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20EN001SUS
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN1EET81W(1.54):bd11/14/2018:svnLENOVO:pn20EN001SUS:pvrThinkPadP50:rvnLENOVO:rn20EN001SUS:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
  dmi.product.family: ThinkPad P50
  dmi.product.name: 20EN001SUS
  dmi.product.sku: LENOVO_MT_20EN_BU_Think_FM_ThinkPad P50
  dmi.product.version: ThinkPad P50
  dmi.sys.vendor: LENOVO

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