Red Hat Bugzilla – Bug 979898
[qemu-kvm]The win2k3-32 guest display is abnormal when using -vga cirrus
Last modified: 2014-06-18 00:31:16 EDT
Description of problem: Boot win2k3 with -vga cirrus, the display is abnormal. Version-Release number of selected component (if applicable): * Red Hat Enterprise Linux Server release 7.0 Beta(Maipo) * kernel-3.10.0-0.rc7.64.el7.x86_64 * qemu-img-1.5.0-2.el7.x86_64 * virtio-win-prewhql-0.1-65 * spice-server-0.12.3-1.el7.x86_64 * seabios-1.7.2-2.el7.x86_64 * vgabios-0.6b-3.7.el6.noarch How reproducible: 100% Steps to Reproduce: 1.Boot guest with CLI /usr/libexec/qemu-kvm -drive file=win2k3-32.qcow2,if=none,cache=unsafe,media=disk,format=qcow2,id=drive-ide0-0-1 -device ide-drive,id=ide1,drive=drive-ide0-0-1,bus=ide.1 -device virtio-balloon-pci,id=balloon1 -monitor stdio -vnc :2 -vga cirrus -usb -device usb-tablet,id=tablet1 -boot menu=on -global kvm-pit.lost_tick_policy=discard -chardev file,path=/root/console.log,id=serial1 -device isa-serial,chardev=serial1,id=s1 -cpu SandyBridge -M pc -smp 4,cores=4 -m 2G -enable-kvm -netdev tap,id=hostnet0,script=/etc/qemu-ifup -device e1000,netdev=hostnet0,mac=00:51:3c:24:31:11,id=net0 2. 3. Actual results: display abnormal Expected results: display normal Additional info: If use -vga std guest display normal.
Created attachment 767247 [details] screen-shot
The problem is in seabios/vgabios. There was a bug fixed by commit in upstream: commit b7b92935df0e309149c042d587e4764548f10608 Author: Kevin O'Connor <kevin@koconnor.net> Date: Sat Mar 9 13:04:47 2013 -0500 vgabios: Fix cirrus memory clear on mode switch. The cirrus_clear_vram() code wasn't actually doing anything because of a u8 overflow. Fix that. Fill with 0xff when performing a legacy cirrus mode switch (WinXP has been observed to incorrectly render dialog boxes if the memory is filled to 0). This was the behavior of the original LGPL vgabios code. To support this, add mechanism (MF_LEGACY) to allow vga drivers to detect if the mode switch is from vesa or int10. Signed-off-by: Kevin O'Connor <kevin@koconnor.net> I'm sending a back-port to corresponding repository.
Fix included in seabios-1.7.2.2-8.el7
*** Bug 1018744 has been marked as a duplicate of this bug. ***
As the test result in bug 1018744 comment 9, this bug has been fixed.
*** Bug 1044804 has been marked as a duplicate of this bug. ***
This request was resolved in Red Hat Enterprise Linux 7.0. Contact your manager or support representative in case you have further questions about the request.