Slight delay with wacom CTL-480 and nouveau drivers on external monitor

[gnubug]

Consider the following setup:

- Thinkpad W530 with optimus (discrete gaphics nvidia Quadro K2200M)
- On docking station
- Connected to an external screen (Dell U3014, 30 inch) via DisplayPort
- Using nouveau drivers
- Using wacom CTL-480 in xournal

When writing text with this setup I notice a minimal delay or/and minimal imprecision of the pen which makes writing annoying. Since the effect is very small, it is hard to describe, but if you write, you feel the problem.

If I switch to the laptop screen, everything works smooth. It also works smooth on the external screen if I use nvidia-340 driver instead of noveau.

Maybe there are some options I could try to make it feel smoother with nouveau drivers, maybe this is a bug.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-input-wacom 1:0.32.0-0ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-93.116-generic 4.4.79
Uname: Linux 4.4.0-93-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
BootLog:
 No key available with this passphrase.
 /dev/mapper/sda3_crypt: clean, 1107052/8855552 files, 31532555/35399936 blocks
Date: Sat Sep 9 09:40:11 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
InstallationDate: Installed on 2016-05-18 (478 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420)
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
MachineType: LENOVO 2447KD9
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-93-generic root=UUID=c2a0eb56-8f89-4a8a-b1b5-a152dfaec126 ro quiet splash acpi=force vt.handoff=7
SourcePackage: xf86-input-wacom
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/18/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: G5ETA3WW (2.63 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2447KD9
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: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG5ETA3WW(2.63):bd09/18/2015:svnLENOVO:pn2447KD9:pvrThinkPadW530:rvnLENOVO:rn2447KD9:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2447KD9
dmi.product.version: ThinkPad W530
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.83+git20170905.d55d0804-0ubuntu0ricotz~16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.0+git20170905+17.2.b4473dd5-0ubuntu0ricotz~16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.0+git20170905+17.2.b4473dd5-0ubuntu0ricotz~16.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.8.99+git20170208.1351e48e-0ubuntu0ricotz2~xenial
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170208.e4fe79cf-0ubuntu0ricotz~xenial
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.13+git20170208.1516d35b-0ubuntu0ricotz~xenial
xserver.bootTime: Thu Sep 7 08:02:33 2017
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 16562
 vendor LEN
xserver.version: 2:1.18.4-0ubuntu0.3