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[Bug 1884990] [NEW] Cirrus graphics results in monochrome colour depth a


From: Kenneth Van Alstyne
Subject: [Bug 1884990] [NEW] Cirrus graphics results in monochrome colour depth at 640x480 resolution
Date: Wed, 24 Jun 2020 15:43:43 -0000

Public bug reported:

Recently we upgraded to a distribution that bundled QEMU 4.2.0.  We were
previously running on QEMU 3.0.0.  When booting Windows 10 VMs on
x86_64, users experienced slow, monochrome graphics and the resolution
was restricted to 640x480.  Reverting to the prior vgabios-cirrus.bin
from the prior source tarball remediated the issue.

An example QEMU command line is below, if needed:
/bin/qemu-system-x86_64 -vnc 0.0.0.0:100 -device 
cirrus-vga,id=video0,bus=pci.0,addr=0x2  -machine 
pc-i440fx-4.2,accel=kvm,usb=off,dump-guest-core=off -cpu qemu64 -m 2048 
-overcommit mem-lock=off -smp 1,sockets=1,cores=1,threads=1 -no-user-config 
-nodefaults -hda test.raw &

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1884990

Title:
  Cirrus graphics results in monochrome colour depth at 640x480
  resolution

Status in QEMU:
  New

Bug description:
  Recently we upgraded to a distribution that bundled QEMU 4.2.0.  We
  were previously running on QEMU 3.0.0.  When booting Windows 10 VMs on
  x86_64, users experienced slow, monochrome graphics and the resolution
  was restricted to 640x480.  Reverting to the prior vgabios-cirrus.bin
  from the prior source tarball remediated the issue.

  An example QEMU command line is below, if needed:
  /bin/qemu-system-x86_64 -vnc 0.0.0.0:100 -device 
cirrus-vga,id=video0,bus=pci.0,addr=0x2  -machine 
pc-i440fx-4.2,accel=kvm,usb=off,dump-guest-core=off -cpu qemu64 -m 2048 
-overcommit mem-lock=off -smp 1,sockets=1,cores=1,threads=1 -no-user-config 
-nodefaults -hda test.raw &

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