msmouse serial mouse emulation broken? No id byte sent on reset
This bug has been copied automatically from: https://bugs.launchpad.net/qemu/+bug/1891830
I took a shot at getting Windows 1.01 working. It doesn't support a PS/2 mouse out-of-the-box but does support MS serial mice. It doesn't seem to detect qemu's emulated msmouse. When I run this command: > qemu-system-i386 -nodefaults -hda my_windows1_hd.qcow2 -vga std -serial msmouse -trace enable='serial*' -icount shift=10,align=on I get this output (edited): 251908@1597626456.800452:serial_ioport_write write addr 0x04 val 0x01 251908@1597626456.800460:serial_ioport_read read addr 0x00 val 0x00 251908@1597626456.800462:serial_ioport_read read addr 0x00 val 0x00 [snip] 251908@1597626456.961641:serial_ioport_read read addr 0x00 val 0x00 251908@1597626456.961642:serial_ioport_read read addr 0x00 val 0x00 251908@1597626456.961644:serial_ioport_read read addr 0x00 val 0x00 251908@1597626456.961647:serial_ioport_write write addr 0x04 val 0x0b 251908@1597626456.961648:serial_ioport_read read addr 0x05 val 0x60 251908@1597626456.961684:serial_ioport_read read addr 0x05 val 0x60 251908@1597626456.961685:serial_ioport_read read addr 0x05 val 0x60 [snip] 251908@1597626457.045894:serial_ioport_read read addr 0x05 val 0x60 251908@1597626457.045895:serial_ioport_read read addr 0x05 val 0x60 251908@1597626457.045897:serial_ioport_read read addr 0x05 val 0x60 251908@1597626457.045932:serial_ioport_read read addr 0x00 val 0x00 The write of 0x01 and then 0x0b to reg 0x04 is the guest turning the RTS line off then on. A real mouse will respond to this by sending 0x4d, which is how the guest detects the mouse. Reproducible in current stable-4.2 and 5.0 (debian's build). I am able to get the guest to use a real passed-through serial mouse (with a minor hack, separate bug filed for this)