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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:24:58 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:27:06 +0000
commit33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch)
tree406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1891830
parentadedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff)
downloadqemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz
qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip
add launchpad bug reports without comments
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+msmouse serial mouse emulation broken? No id byte sent on reset
+
+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)
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