Hello, thanks for taking time to report this.

Are you using any compression (lz, glz, quic ...) ? The compression itself could be the problem sometimes.

qemu command line, guest-tools version and the client and client version that you are using please.

(In reply to Coolper Chen from comment #0)
> Created attachment 122784 [details]
> picture
> 
> the attachment picture shows the display problem,there are some dotted lines
> that should be display.
> 
> how to reproduce:
> 1.install PhotoShop CS6 on windows 7;
> 2.run PhotoShop and open an image;
> 3.set image scale to 100% or 200%;
> 4.use mouse to select a region,move mouse quickly,it will show some dotted
> lines; if move mouse slowly,it will not show dotted lines;

Hi, spicec is deprecated. Please test with remote-viewer.

I tested on spice-server version 0.12.4 and 0.12.6,remote-viewer version 0.5.6,all have the problem.

I write a tool based on spice replay,it can manully control drawing spice graphic command one by one.

The attachments 0.png is snapshot of using remote-viewer,1.png to 10.png is snapshot for drawing sequence of the problem.

libvirt xml:
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>win7</name>
  <uuid>9b1e6fc2-2589-4df5-98b1-d88dc2114eff</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-1.7'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <cpu>
    <topology sockets='1' cores='2' threads='1'/>
  </cpu>
  <clock offset='localtime'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qed'/>
      <source file='/home/cc/work/vm/win7ultimate.img'/>
      <target dev='hda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x2'/>
    </controller>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <interface type='bridge'>
      <mac address='00:25:35:44:25:07'/>
      <source bridge='sharebr'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='tablet' bus='usb'/>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='spice' port='10000' autoport='no' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
      <channel name='main' mode='insecure'/>
      <channel name='inputs' mode='insecure'/>
    </graphics>
    <sound model='ich6'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </sound>
    <video>
      <model type='qxl' ram='65536' vram='262144' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <redirdev bus='usb' type='spicevmc'>
      <address type='usb' bus='0' port='3'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <address type='usb' bus='0' port='4'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <address type='usb' bus='0' port='5'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <address type='usb' bus='0' port='6'/>
    </redirdev>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
    </memballoon>
  </devices>
</domain>

Created attachment 122804 [details]
0.png

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1.png

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2.png

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3.png

Created attachment 122808 [details]
4.png

Created attachment 122809 [details]
5.png

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6.png

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7.png

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8.png

Created attachment 122813 [details]
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Created attachment 122814 [details]
10.png

Hi,

can you try with different compression methods / with disabled compression ?

See http://libvirt.org/formatdomain.html#elementsGraphics.
It is also possible that driver is doing something wrong.

Do you have the latest spice guest tools ?

Thanks

(note: remote-viewer 0.5.6 is 3 years old)

my enviroment:
spice-server 0.12.6
spice-gtk 0.31
spice-guest-tools-0.100.exe
libvirt 1.2.2
qemu-kvm 2.0.1
Ubuntu 14.04.4 LTS

I disable spice compression with:
<image compression='off'/>
<jpeg compression='never'/>
<zlib compression='never'/>

also I try glz,lz,quic compression method,but all have the problem.

Fixed by https://cgit.freedesktop.org/spice/spice/commit/?id=aac24601647c9077199c1e9e17e794f5a354c4ba.
Maybe should be backported?

To the 0.12 branch? Yes, bug fixes can (and should ;) definitely be backported to that branch, at least when they are not invasive changes, or when the backport is not complicated.

Backported to 0.12 branch.