[Bug 1793297] Re: windows's paint software cross-shadped cursor offset a pixel in guest windows which is generated by qemu-kvm

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to another 
system. For this we need to know which bugs are still valid and which could be 
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state 
back to "New" within the next 60 days, otherwise this report will be marked as 
"Expired". Or mark it as "Fix Released" if the problem has been solved with a 
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** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1793297

Title:
  windows's paint software cross-shadped cursor offset a pixel in guest
  windows which is generated by qemu-kvm

Status in QEMU:
  Incomplete

Bug description:
  I have already tested lots of versions of QEMU. Since qemu-2.3.0 -- 
qemu-3.0.0. I find weird phenomena about windows's paint software cross-shaped 
cursor offset a pixel since qemu-2.10.0, but it is ok before the version of 
qemu-2.10.0. Only spice agent and service are running in guest windows since 
qemu-2.10.0, windows's paint software cross-shaped cursor offset a pixel is the 
same as the windows's paint software cross-shaped cursor focus point is the 
same as the true windows machine instead of virtual windows machine.
  What does QEMU change since qemu-2.10.0? It is the changes that result in 
windows's paint software cross-shaped cursor is not accurate with true windows 
machine for comparison.  
  The following is the full command line used to launch the QEMU guest:
  # /usr/bin/qemu-system-x86_64 -m 4096 -smp 2 -M pc -name win7-6904 -hda 
/home/win7_kvmgt.img -bios /usr/bin/bios.bin -enable-kvm -k en-us -vga qxl 
-display egl-headless -spice disable-ticketing,port=6904,streaming-video=all 
-machine kernel_irqchip=on,usb=on -global PIIX4_PM.disable_s3=1 -global 
PIIX4_PM.disable_s4=1 -cpu host -device usb-tablet

  BTW, guest windows display card is QXL driver.
  But the following full command line used to launch the QEMU guest is OK. For 
comparison, I pasted it below (Just add vdagent and spicevmc in the command 
line to make sure spice service and agent is running in the guest windows):
  # /usr/bin/qemu-system-x86_64 -m 4096 -smp 2 -M pc -name win7-6904 -hda 
/home/win7_kvmgt.img -bios /usr/bin/bios.bin -enable-kvm -k en-us -vga qxl 
-display egl-headless -spice disable-ticketing,port=6904,streaming-video=all 
-machine kernel_irqchip=on,usb=on -global PIIX4_PM.disable_s3=1 -global 
PIIX4_PM.disable_s4=1 -cpu host -device usb-tablet -device 
virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x5 -chardev 
spicevmc,name=vdagent,id=vdagent -device 
virtserialport,nr=1,bus=virtio-serial0.0,chardev=vdagent,name=com.redhat.spice.0

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