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Canvases causing wonky display issues -- sometimes -- only on my VM
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Bobthespirit  
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 More options Apr 5 2012, 5:58 pm
From: Bobthespirit <bobthespi...@gmail.com>
Date: Thu, 5 Apr 2012 14:58:32 -0700 (PDT)
Local: Thurs, Apr 5 2012 5:58 pm
Subject: Canvases causing wonky display issues -- sometimes -- only on my VM
I have Chrome Frame installed in IE8 in a Windows 7 VM on a Mac OS
Lion.

My site has several canvases.  One always at the bottom of the screen,
another that show when you scroll.

You load the page and see the canvas at the bottom of the screen, it's
fine.  You scroll over to make the other canvases show, suddenly the
display gets weird and crazy.  When you scroll them back off the
screen so they hide, display goes back to normal.

This happens on my VM.  On everybody else's VM, it's fine.  With a
normal IE7 or 8 outside a VM, it's fine.  Connected to a remote
desktop through my computer, it's fine.  Does anyone have any idea why
this might be happening?


 
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Alex Russell  
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 More options Apr 17 2012, 9:36 am
From: Alex Russell <slightly...@google.com>
Date: Tue, 17 Apr 2012 14:36:33 +0100
Local: Tues, Apr 17 2012 9:36 am
Subject: Re: [google-chrome-frame:2911] Canvases causing wonky display issues -- sometimes -- only on my VM
What version of GCF? Are they 2D or 3D canvas contexts?


 
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Greg Thompson  
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 More options Apr 17 2012, 9:44 am
From: Greg Thompson <g...@chromium.org>
Date: Tue, 17 Apr 2012 09:44:06 -0400
Local: Tues, Apr 17 2012 9:44 am
Subject: Re: [google-chrome-frame:2911] Canvases causing wonky display issues -- sometimes -- only on my VM

I wonder if the VM is presenting a GPU to Windows.  Would you follow the
directions here (
http://www.chromium.org/developers/how-tos/chrome-frame-getting-start...)
to set AllowUnsafeURLs=1 in your registry and then type "gcf:about:gpu" in
the address bar?  Please copy-n-paste the results into a response here so
we can see what Chrome thinks about the presence/absence of a GPU in the
virtualized Windows environment.  Thanks.

 
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amit.pa...@gmail.com  
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 More options Jul 13 2012, 1:58 pm
From: amit.pa...@gmail.com
Date: Fri, 13 Jul 2012 10:58:52 -0700 (PDT)
Local: Fri, Jul 13 2012 1:58 pm
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

I think I may be having the same issue. I am in a Windows 7 VM on a mac.
Every mac with this win7 vm seems to be having the same issue in chrome.
The issue is also shown if you visit city-data.com (
http://www.city-data.com/city/San-Francisco-California.html ). After the
page load, the entire page gets heavily distorted (my view:  
http://i.imgur.com/zwZDn.png ). Is there any way to fix this issue? It does
not seem to have this issue in any other browser in the VM and is fine on
chrome in the Mac side (or when it is run on windows outside the VM).


 
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Alex Russell  
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 More options Aug 2 2012, 6:53 am
From: Alex Russell <slightly...@google.com>
Date: Thu, 2 Aug 2012 11:53:45 +0100
Local: Thurs, Aug 2 2012 6:53 am
Subject: Re: [google-chrome-frame:3120] Re: Canvases causing wonky display issues -- sometimes -- only on my VM
Sorry for the slow response.

I have a Win7 VM on OS X under VMWare Fusion 4.1.3 and I'm not seeing
the issue you list on the current Chrome Stable channel (21). Can you
confirm that the issue either still exists, and if so, can you provide
more information about your VM host and client versions and
configuration?

Thanks!


 
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cha...@gmail.com  
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 More options Aug 9 2012, 10:26 am
From: cha...@gmail.com
Date: Thu, 9 Aug 2012 07:26:05 -0700 (PDT)
Local: Thurs, Aug 9 2012 10:26 am
Subject: Re: [google-chrome-frame:3120] Re: Canvases causing wonky display issues -- sometimes -- only on my VM

Hi,
  I am experiencing display issues with canvas elements on chrome under
vmware fusion that may be related to these issues.

Here is some info:

* Happens in chrome standalone browser (stable 21).  I haven't tested it in
GCF.

Related bug with screen shot that looks similar to the problem I am
experiencing:  http://code.google.com/p/chromium/issues/detail?id=112989
* Note that this bug claims it only happens in 64 bit virtual machine,
perhaps you are testing with a 32 bit VM?

My environment:
OS X 10.7.4
Graphics: Intel HD Graphcis 3000 512MB
vmWare Fusion 4.1.3
Windows 7 Professional x64

jsfiddle that reproduces the problem: http://jsfiddle.net/fvdDt/1/
* Note - The bug is not triggered until drawImage() is called.

The bug does not occur if I disable GPU acceleration for the virtual
machine in vmWare fusion.

I have been using this virtual machine for all of my work during the past
two months and haven't noticed any other issues with rendering or display
on any other program.  This jsfiddle renders fine on ie9, ff and safari
under the VM.  It also renders fine when running chrome and safari under os
x on the same machine (i.e., its probably not the mac os x video driver,
although it could be a bug in vmware fusions driver).

Hope this helps.

Chris


 
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jason.nor...@gmail.com  
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 More options Aug 23 2012, 10:39 am
From: jason.nor...@gmail.com
Date: Thu, 23 Aug 2012 07:39:17 -0700 (PDT)
Local: Thurs, Aug 23 2012 10:39 am
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

I'm experiencing the exact same problem. Has anyone resolved this yet?
(Other than disabling graphics acceleration?)

Jason


 
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hannahrols...@gmail.com  
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 More options Aug 23 2012, 10:54 am
From: hannahrols...@gmail.com
Date: Thu, 23 Aug 2012 07:54:13 -0700 (PDT)
Local: Thurs, Aug 23 2012 10:54 am
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

I'm experiencing the exact same thing through VM Ware.


 
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vij...@gmail.com  
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 More options Sep 12 2012, 12:11 am
From: vij...@gmail.com
Date: Tue, 11 Sep 2012 21:11:58 -0700 (PDT)
Local: Wed, Sep 12 2012 12:11 am
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

I have the same problem.  To workaround I now launch chrome with
"--blacklist-accelerated-compositing" command line arg, which disables a
set of hardware accelerated features on Chrome.


 
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Chris Clark  
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 More options Sep 12 2012, 9:45 am
From: Chris Clark <bobthespi...@gmail.com>
Date: Wed, 12 Sep 2012 09:45:57 -0400
Local: Wed, Sep 12 2012 9:45 am
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM
Is there any way to have that happen automatically, or launch Chrome
Frame with that option?  That would work for my own private browsing
but not for end users.


 
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cha...@gmail.com  
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 More options Sep 12 2012, 2:08 pm
From: cha...@gmail.com
Date: Wed, 12 Sep 2012 11:08:57 -0700 (PDT)
Local: Wed, Sep 12 2012 2:08 pm
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

I just tried out --blacklist-accelerated-compositing and it is certainly an
improvement, but still doesn't fix all of the issues.  This gave me the
idea to search for an option to disable hardware acceleration and I found
this one:

--disable-accelerated-2d-canvas

And it completely solves my problem!  I modified my chrome shortcut to pass
this option on startup so it is always active.  Unfortunately I don't know
how to pass this for chrome frame.

Chris


 
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Robert Shield  
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 More options Sep 12 2012, 2:24 pm
From: Robert Shield <robertshi...@chromium.org>
Date: Wed, 12 Sep 2012 14:24:25 -0400
Local: Wed, Sep 12 2012 2:24 pm
Subject: Re: [google-chrome-frame:3257] Re: Canvases causing wonky display issues -- sometimes -- only on my VM

On Wed, Sep 12, 2012 at 2:08 PM, <cha...@gmail.com> wrote:
> I just tried out --blacklist-accelerated-compositing and it is certainly
> an improvement, but still doesn't fix all of the issues.  This gave me the
> idea to search for an option to disable hardware acceleration and I found
> this one:

> --disable-accelerated-2d-canvas

> And it completely solves my problem!  I modified my chrome shortcut to
> pass this option on startup so it is always active.  Unfortunately I don't
> know how to pass this for chrome frame.

You can pass parameters to Chrome Frame via group policy. See:
http://www.chromium.org/administrators/policy-list-3#AdditionalLaunch...


 
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netsima...@googlemail.com  
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 More options Nov 14 2012, 8:02 am
From: netsima...@googlemail.com
Date: Wed, 14 Nov 2012 05:02:51 -0800 (PST)
Local: Wed, Nov 14 2012 8:02 am
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

This solves the problem for chrome:

Point chrome to

chrome://flags/

*Disable accelerated 2D canvas* Mac, Windows, Linux, Chrome OS

Disables the use of the GPU to perform 2d canvas rendering and instead uses
software rendering.

Is there any way to set the flags in Chrome Frame


 
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amit.pa...@gmail.com  
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 More options Jan 16, 2:13 pm
From: amit.pa...@gmail.com
Date: Wed, 16 Jan 2013 11:13:32 -0800 (PST)
Local: Wed, Jan 16 2013 2:13 pm
Subject: Re: Canvases causing wonky display issues -- sometimes -- only on my VM

this did not solve the problem for me. can anyone else confirm whether this
did or did not help them?

I am running:
Chrome Version 24.0.1312.52 m
Windows 7 32bit VM on Mac OSX 10.7.5
VM Version 4.1.3 (730298)
Intel HD Graphics 4000 384 MB

It only happens in Chrome. I see no issues in IE, Firefox, or Safari. Since
I last posted, it has also started occurring on the Google homepage.

On Wednesday, November 14, 2012 5:02:51 AM UTC-8, netsi...@googlemail.com
wrote:


 
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Greg Thompson  
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 More options Jan 17, 10:00 am
From: Greg Thompson <g...@chromium.org>
Date: Thu, 17 Jan 2013 10:00:28 -0500
Local: Thurs, Jan 17 2013 10:00 am
Subject: Re: [google-chrome-frame:3535] Re: Canvases causing wonky display issues -- sometimes -- only on my VM

On Wed, Jan 16, 2013 at 2:13 PM, <amit.pa...@gmail.com> wrote:
> this did not solve the problem for me. can anyone else confirm whether
> this did or did not help them?

> I am running:
> Chrome Version 24.0.1312.52 m
> Windows 7 32bit VM on Mac OSX 10.7.5
> VM Version 4.1.3 (730298)
> Intel HD Graphics 4000 384 MB

> It only happens in Chrome. I see no issues in IE, Firefox, or Safari.
> Since I last posted, it has also started occurring on the Google homepage.

Please have a look at http://crbug.com/169848. Does turning off
Threaded Compositing
fix it for you?


 
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Chris Clark  
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 More options Jan 17, 12:09 pm
From: Chris Clark <bobthespi...@gmail.com>
Date: Thu, 17 Jan 2013 12:09:27 -0500
Local: Thurs, Jan 17 2013 12:09 pm
Subject: Re: [google-chrome-frame:3535] Re: Canvases causing wonky display issues -- sometimes -- only on my VM
Turning off threaded compositioning seems to fix it in Chrome, but how
do you do this on Chrome Frame?


 
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Greg Thompson  
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 More options Jan 17, 1:16 pm
From: Greg Thompson <g...@chromium.org>
Date: Thu, 17 Jan 2013 13:16:11 -0500
Local: Thurs, Jan 17 2013 1:16 pm
Subject: Re: [google-chrome-frame:3535] Re: Canvases causing wonky display issues -- sometimes -- only on my VM

On Thu, Jan 17, 2013 at 12:09 PM, Chris Clark <bobthespi...@gmail.com>wrote:

> Turning off threaded compositioning seems to fix it in Chrome, but how
> do you do this on Chrome Frame?

The "AdditionalLaunchParameters" Group Policy setting (
http://www.chromium.org/administrators/policy-list-3#AdditionalLaunch...)
allows you to specify command line arguments to be passed to Chrome by
Chrome Frame. If you use GP to push settings out to a fleet of machines,
then you can set that policy option to "--disable-threaded-compositing". If
you want to set it on a single machine, then you can do it via registry
hacking. Set the REG_SZ value "AdditionalLaunchParameters"
to "--disable-threaded-compositing" in the
key HKEY_LOCAL_MACHINE\Software\Policies\Google\Chrome.  I've attached a
.reg file that should do this for you via regedit.exe.

  additional launch parameters.reg
< 1K Download

 
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Greg Thompson  
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 More options Jan 17, 1:22 pm
From: Greg Thompson <g...@chromium.org>
Date: Thu, 17 Jan 2013 13:22:19 -0500
Local: Thurs, Jan 17 2013 1:22 pm
Subject: Re: [google-chrome-frame:3535] Re: Canvases causing wonky display issues -- sometimes -- only on my VM

I forgot to mention: If you would be so kind, please follow the directions
here:
http://www.chromium.org/developers/how-tos/chrome-frame-getting-start...
 to AllowUnsafeURLs then visit gcf:chrome://gpu and copy-n-paste the
contents of that page into either a comment on bug
http://crbug.com/169848or directly to me so that we can fix the
underlying problem. It is
certainly our intent that Chrome and Chrome Frame should simply work for
you out of the box rather than requiring these workarounds. Thanks!


 
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