[Qemu-devel] [Bug 1834113] Re: QEMU touchpad input erratic after wakeup from sleep

[Rafael David Tinoco]

Avi,

Something I have realized we missed as a feedback here - or maybe I
missed checking previous comments - is how your mouse is being setup for
the guest. Is it being PS/2 emulated (default) or is it being given as
an USB device (when qemu cmd line has "-usb -device usb-tablet"). Also,
are you using SPICE protocol (perhaps with USB direction option ?).

Are you able to tell which xserver-xorg-input-XX module is being used
inside the guest ? You will probably find that information from Xorg log
files (check if you're using xf86-input-wacom or xserver-xorg-input-
evdev or some other).

Another thing that comes to my mind as well, are you using powersaving
features ? Specifically the I2C bus I'm concerned. Using "powertop", you
are able to change "Runtime PM for I2C Adapter" option under the
Tunables Tab (turning the power mgmt to off). I would like to know if
you are able to reproduce the issue without having power management
enabled for I2C. You can try disabling only I2C and then disabling all
PM options as a second attempt.

>From your host:

Device #1

[    2.834320] input: WCOM488E:00 056A:488E Mouse as
/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-
WCOM488E:00/0018:056A:488E.0001/input/input12

[    3.064686] input: Wacom HID 488E Finger as
/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-
WCOM488E:00/0018:056A:488E.0001/input/input17

Device #2

[    2.834860] input: SYNA2393:00 06CB:7A13 Mouse as
/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-6/i2c-
SYNA2393:00/0018:06CB:7A13.0002/input/input13

[    2.834929] input: SYNA2393:00 06CB:7A13 Touchpad as
/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-6/i2c-
SYNA2393:00/0018:06CB:7A13.0002/input/input14

Could you describe your input devices ? How many mice, trackpads, pens,
etc, you are using connected to the host ?

Thanks! And sorry for so many questions =).

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https://bugs.launchpad.net/bugs/1834113

Title:
  QEMU touchpad input erratic after wakeup from sleep

Status in QEMU:
  Incomplete
Status in libvirt package in Ubuntu:
  Incomplete
Status in qemu package in Ubuntu:
  Incomplete

Bug description:
  Using Ubuntu host and guest. Normally the touchpad works great. Within
  the last few days, suddenly, apparently after a wake from sleep, the
  touchpad will behave erratically. For example, it will take two clicks
  to select something, and when moving the cursor it will act as though
  it is dragging even with the button not clicked.

  A reboot fixes the issue temporarily.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: qemu 1:3.1+dfsg-2ubuntu3.1
  Uname: Linux 5.1.14-050114-generic x86_64
  ApportVersion: 2.20.10-0ubuntu27
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Jun 24 20:55:44 2019
  Dependencies:
   
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2019-02-20 (124 days ago)
  InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 
20180608-09:38
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 002: ID 8087:0025 Intel Corp. 
   Bus 001 Device 003: ID 0c45:671d Microdia 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. Precision 5530
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.1.14-050114-generic 
root=UUID=18e8777c-1764-41e4-a19f-62476055de23 ro mem_sleep_default=deep 
mem_sleep_default=deep acpi_rev_override=1 scsi_mod.use_blk_mq=1 
nouveau.modeset=0 nouveau.runpm=0 nouveau.blacklist=1 acpi_backlight=none 
acpi_osi=Linux acpi_osi=!
  SourcePackage: qemu
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/26/2019
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.10.1
  dmi.board.name: 0FP2W2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.10.1:bd04/26/2019:svnDellInc.:pnPrecision5530:pvr:rvnDellInc.:rn0FP2W2:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: Precision
  dmi.product.name: Precision 5530
  dmi.product.sku: 087D
  dmi.sys.vendor: Dell Inc.

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