Hello team / Christopher,

One more interesting finding, which points towards Compiz + GLX + 
nouveau:

1. The glxgears works fine on first monitor (60 fps or more) but very 
slow on secondary. Actually, the speed is "obvious": exactly 1 fps !
This happens only if the whole window is on the secondary. If even a 
tiny fraction of the window remains on first monitor (even just a single 
pixel), the speed is normal.

2. When glxgears or glxheads runs on first monitor, the 
mouse-dissappearing-zone is clear and stable: No mouse pointer between 
1/8 and 3/8 of the screen from top.
This happens regardless of where the glxgear windows is placed (in 1st 
monitor).
It also happens if only a tiny fraction of the window remains on first 
monitor (even just a single pixel), while the rest is in secondary.

3. When glxgears or glxheads runs on second monitor, the pointer 
flickers in the mouse-dissappearing-zone, however, it remains mainly 
visible.

I found some older chats blaming the nouveau drivers for X-org. However, 
the nvidia does not work for me (no second monitor at all), so could not 
check.

Best regards,
Michael


Στις 12.01.2017 07:16, Christopher M. Penalver έγραψε:
> Michael Grivas, thank you for reporting this and helping make Ubuntu
> better.
> 
> 1) Could you please advise how your monitor and laptop are connected
> (ex. HDMI, VGA, etc.)?
> 2) Does using the nvidia proprietary driver change anything regarding 
> this?
> 3) If you disable the graphics card via your BIOS does this influence
> this issue?
> 4) To see if this is already resolved in Ubuntu, could you please test
> http://cdimage.ubuntu.com/daily-live/current/ and advise to the
> results?
> 
> ** Changed in: xorg (Ubuntu)
>    Importance: Undecided => Low
> 
> ** Changed in: xorg (Ubuntu)
>        Status: New => Incomplete
> 
> --
> You received this bug notification because you are subscribed to the 
> bug
> report.
> https://bugs.launchpad.net/bugs/1645891
> 
> Title:
>   After adding a second monitor, mouse pointer flickers and/or
>   disappears in a zone near the top of first (notebook) monitor, while
>   some apps show slow in ext display.
> 
> Status in xorg package in Ubuntu:
>   Incomplete
> 
> Bug description:
>   It seems to be duplicate of both :
>   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1641467
>   and
>   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1629300  .
>   Possibly related to
> https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1278223
> 
>   A - flickering in first display.
>   The zone starts just below the top panel and its height is about 1/7
> of the screen.
>   Flickering starts immediately entering the zone, even half of the
> pointer may be flickering.
>   To the centre of the zone, flickering is more prevalent, up to
> completely disappearing.
>   The flickering has a periodic pattern, which seems to be affected by
> the windows displaying in the second (external) monitor !!
> 
>   B - external monitor.
>   Some applications show really slow there. Worse case is HipChat
> (Atlassian chat program), which shows fine as long as even a tiny
> fraction exists on the primary display.
>   At the moment the whole window passes to the secondary, then even
> the scroll bar has a delay of a second a move.
> 
>   To check, I have played with the ~/.config/monitors.xml without 
> success.
>   It seems that each configuration is saved there, even duplicates,
> after adding the same external monitor and re-configuring it (absolute
> duplicate in monitors.xml)
> 
>   C. Side-effects and related phenomena.
>   Some times the "Screen display" control freaks, when enabling the
> external monitor. It may freeze or insist to put them in mirroring.
> Most of the times it just forgets a setup (although in monitors.xml)
> after adding a different external monitor.
>   For each workspace, there is a different background, done with
> Unit5y Tweak Tool.
> 
>   All updates have been done, without effect.
> 
>   ProblemType: Bug
>   DistroRelease: Ubuntu 16.10
>   Package: xorg 1:7.7+13ubuntu4
>   ProcVersionSignature: Ubuntu 4.8.0-27.29-generic 4.8.1
>   Uname: Linux 4.8.0-27-generic x86_64
>   .tmp.unity_support_test.0:
> 
>   ApportVersion: 2.20.3-0ubuntu8
>   Architecture: amd64
>   CompizPlugins: No value set for
> `/apps/compiz-1/general/screen0/options/active_plugins'
>   CompositorRunning: compiz
>   CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
>   CompositorUnredirectFSW: true
>   CurrentDesktop: Unity
>   Date: Tue Nov 29 23:18:52 2016
>   DistUpgraded: Fresh install
>   DistroCodename: yakkety
>   DistroVariant: ubuntu
>   DkmsStatus: virtualbox, 5.1.6, 4.8.0-27-generic, x86_64: installed
>   ExtraDebuggingInterest: Yes
>   GraphicsCard:
>    Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00
> [VGA controller])
>      Subsystem: Lenovo HD Graphics 530 [17aa:222e]
>    NVIDIA Corporation GM107GLM [Quadro M1000M] [10de:13b1] (rev a2)
> (prog-if 00 [VGA controller])
>      Subsystem: Lenovo GM107GLM [Quadro M1000M] [17aa:222e]
>   InstallationDate: Installed on 2016-11-09 (20 days ago)
>   InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 
> (20161012.2)
>   MachineType: LENOVO 20EN0019US
>   ProcKernelCmdLine:
> BOOT_IMAGE=/boot/vmlinuz-4.8.0-27-generic.efi.signed
> root=UUID=c3151b80-1188-4c23-816c-57ebe18688a8 ro quiet splash
> vt.handoff=7
>   SourcePackage: xorg
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 08/03/2016
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: N1EET57W (1.30 )
>   dmi.board.asset.tag: Not Available
>   dmi.board.name: 20EN0019US
>   dmi.board.vendor: LENOVO
>   dmi.board.version: SDK0J40705 WIN
>   dmi.chassis.asset.tag: No Asset Information
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: None
>   dmi.modalias:
> dmi:bvnLENOVO:bvrN1EET57W(1.30):bd08/03/2016:svnLENOVO:pn20EN0019US:pvrThinkPadP50:rvnLENOVO:rn20EN0019US:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
>   dmi.product.name: 20EN0019US
>   dmi.product.version: ThinkPad P50
>   dmi.sys.vendor: LENOVO
>   version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu2
>   version.ia32-libs: ia32-libs N/A
>   version.libdrm2: libdrm2 2.4.70-1
>   version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu2
>   version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 
> N/A
>   version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu2
>   version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu6.1
>   version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 
> 1:2.10.2-1ubuntu1
>   version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.1-1
>   version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.99.917+git20160706-1ubuntu1
>   version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
> 1:1.0.12-2
>   xserver.bootTime: Fri Nov 25 08:07:33 2016
>   xserver.configfile: default
>   xserver.logfile: /var/log/Xorg.0.log
>   xserver.version: 2:1.18.4-1ubuntu6.1
>   xserver.video_driver: modeset
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1645891/+subscriptions

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1645891

Title:
  After adding a second monitor, mouse pointer flickers and/or
  disappears in a zone near the top of first (notebook) monitor, while
  some apps show slow in ext display.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1645891/+subscriptions

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