Try to reproduce this issue with old build:
virt-viewer-0.6.0-12.el7.x86_64

steps to reproduce this issue:

1. Prepare a spice guest:
# virsh dumpxml l-vm1

    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0' state='connected'/>
      <alias name='channel1'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    </channel>
...
    <graphics type='spice' port='5900' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
...
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>

2. Use remote-viewer connect to guest in windowed mode:

# remote-viewer spice://$ip:5900

3. Resize the window to a size bigger than the screen width

My question is: 
Q1: "window" here means virt-viewer display window ?
Q2: How about "screen width" here means here, screen in VM or in host, i think is in VM, but i'm not sure.

So pgrunt, please help give some advices, thanks.

In screentshot-1, then i use mouse to drag virt-viewer window to right side, then i can see virt-viewer window is set back to the guest screen width, and Contents (ie the Date showing) is scaled down to fit into the window, detail please see Screentshot-2.

Then try to verify with new build:
virt-viewer-2.0-5.el7.x86_64

Steps same with above.

Result: After step3,  virt-viewer window can keep where you dragged, and 
Contents are at scale 100%, in Screentshot-3.

Please help me check whether my steps and result are enough to verify this bug, thanks.

Created attachment 1055662 [details]
screenshot-1

Created attachment 1055663 [details]
screenshot-2

Created attachment 1055664 [details]
screenshot-3

(In reply to zhoujunqin from comment #3)
> Try to reproduce this issue with old build:
> virt-viewer-0.6.0-12.el7.x86_64
> 
> steps to reproduce this issue:
> 
> 1. Prepare a spice guest:
> # virsh dumpxml l-vm1
> 
>     <channel type='spicevmc'>
>       <target type='virtio' name='com.redhat.spice.0' state='connected'/>
>       <alias name='channel1'/>
>       <address type='virtio-serial' controller='0' bus='0' port='2'/>
>     </channel>
> ...
>     <graphics type='spice' port='5900' autoport='yes' listen='0.0.0.0'>
>       <listen type='address' address='0.0.0.0'/>
>     </graphics>
> ...
>     <video>
>       <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/>
>       <alias name='video0'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0'/>
>     </video>
> 
> 2. Use remote-viewer connect to guest in windowed mode:
> 
> # remote-viewer spice://$ip:5900
> 
> 3. Resize the window to a size bigger than the screen width
> 
> My question is: 
> Q1: "window" here means virt-viewer display window ?
yes

> Q2: How about "screen width" here means here, screen in VM or in host, i
> think is in VM, but i'm not sure.

screen of the client's monitor, ie if your monitor resolution is 1024x768 then resize the virt-viewer's window to be bigger than 1024x768

> 
> So pgrunt, please help give some advices, thanks.
> 
> In screentshot-1, then i use mouse to drag virt-viewer window to right side,
> then i can see virt-viewer window is set back to the guest screen width, and
> Contents (ie the Date showing) is scaled down to fit into the window, detail
> please see Screentshot-2.
> 
> Then try to verify with new build:
> virt-viewer-2.0-5.el7.x86_64
> 
> Steps same with above.
> 
> Result: After step3,  virt-viewer window can keep where you dragged, and 
> Contents are at scale 100%, in Screentshot-3.
> 
> Please help me check whether my steps and result are enough to verify this
> bug, thanks.

They are enough to verify, the window should not be scaled down

Thanks for pgrunt's reply, and according to above comments, move this bug from ON_QA to VERIFIED.

This bug might not be fixed, the reproducer is:
0. connect to the rhel7 guest with windowed remote-viewer, make sure that arbitrary resolution works (resize window a bit, guest adusts)
1. enlarge guest size using xrandr within the guest to something large enough to trigger the auto-fit-to-client-window-monitor behaviour, e.g.:
    xrandr --output Virtual-0 --mode 1920x1080
  for r-v window residing on fullhd client monitor

Actual result:
  * guest resolution is adjusted to the resolution specified (good)
  * r-v window gets shrunk to fit the client monitor area (bad)
  * arbitrary resolution stops working until guest is shrunk from within again
     (über bad)
  * r-v takes this zoomed-out guest view as 1:1 so View-Zoom-Normal size won't
     resize the window to a size that'd make guest diplay actually 1:1 (über bad
     as well0

Expected result:
  * resolution is changed as requested from the guest
  * 1:1 is always 1:1
  * arbitrary resolution always works

Setting needinfo on Pavel to investigate

(In reply to David Jaša from comment #9)
Hi David,
i see you comment and i also tried as you described in Comment 9.
Following is my result:
Before when i reproduce/verify this issue i used a rhel6 guest, this time, i also tried with rhel7 guest.

Package version:
virt-viewer-2.0-6.el7.x86_64

Steps:
Prepare a rhel7.2 guest installed with new tree:
http://download.englab.nay.redhat.com/pub/rhel/rel-eng/RHEL-7.2-20150904.0/compose/Server/x86_64/os/

1. Connect to the rhel7 guest with windowed remote-viewer, make sure that arbitrary resolution works (resize window a bit, guest adjusts)
# remote-viewer spice://127.0.0.1:5901

2. My host monitor resolution is: 1280x1024
Enlarge guest size using xrandr within the guest to something large enough to trigger the auto-fit-to-client-window-monitor behaviour, e.g.:
    xrandr --output Virtual-0 --mode 1920x1080

Result now: I can reproduce following result sometimes.
Please see attachment.

But when i test above steps with a rhel7.1 released guest, i cannot reproduce Comment 9 issue, thanks.

Created attachment 1070628 [details]
rhel7.2 guest screenshot when resolution is 1920*1080

David, 
in the step 0 of your reproducer - are you increasing or decreasing the resolution?

As zhoujunqin confirmed your problem is not reproducible with RHEL-7.1 guests, so I think the bug is not in virt-viewer, but it is the bug 1242847.
Jonathon's fix for it is already in f22 kernel (see bug 1212201), can you reproduce your problem there as well?

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2211.html