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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/peripherals/1715296
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloademulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+qemu: invalid serial port configuration
+
+The tty_serial_init() function sets the port c_oflags as follows:
+tty.c_oflag |= OPOST not clearing ONLCR, ONLRET and others.
+The result is that the postprocess output is enabled and host translates 0xa (LF) to 0xd 0xa (CR LF) which breaks the binary transmissions on serial port even if you set the port to raw mode (no matters if on host and/or guest).
+The issue has been reported 11 years ago on qemu-devel mailing list:
+https://lists.nongnu.org/archive/html/qemu-devel/2006-06/msg00196.html
+There was also a FreeBSD patch including the fix:
+https://lists.freebsd.org/pipermail/freebsd-ports/2006-October/036390.html
+
+I think the correct port configuration is:
+tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IMAXBEL);
+tty.c_oflag &= ~OPOST;
+
+In such case the host will perform no output processing and will pass the data as is.
+And the guest will be able to configure input/output processing exactly as it wants.
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