since I couldn't fix it myself, I file following BUG-REPORT:
[1.] with vanilla linux kernels 2.2.{1,2,3} I can't toggle the DTR line -
with 2.0.34 I can.
[2.] setting c_lflag to speed 0 (masking with CTBAUD and |ing B0) and using
cfsetospeed(), cfsetispeed(), tcsetattr() should toggle the (16550) UART
line 'DTR', causing a connected modem to hang-up (reset). With a Linux 2.0.34
kernel it does work as expected, but not so with any Linux 2.2.x kernel so
far. I tested also the terminal application 'minicom' (V1.75) - same results.
[3.] serial-i/o 2.0/2.2 incompatibility
[4.] Linux version 2.2.3 (root@prawda) (gcc version 2.7.2.3)
[5.] n/a
[6.] on request. but try minicom's hangup by toggle DTR feature.
[7.]
[7.1.]
Kernel modules 2.1.121
Gnu C 2.7.2.3
Binutils 2.9.1
Linux C Library 2.0.7
Dynamic linker ldd: version 1.9.9
Procps 1.2.7
Mount 2.7l
Net-tools (1998-03-02)
Kbd 0.94
Sh-utils 1.16
[7.2.]
AMD K6II 400MHz DFI Motherboard VIA Apollo chipset,
Intel Pentium 133MHz no-name MB with Opti Viper-M chipset
[7.3.]
serial io not compiled as module
[7.4.]
n/a
[7.5.]
Debian 2.0 Distribution - partly upgraded
I tried various glibc2 versions, recompiled my code and minicom,
but nothing helped.
I didn't touched the kernel so far. I'm using the on-board UARTs
and configured the kernel as follows:
--8<--
CONFIG_SERIAL=y
# CONFIG_SERIAL_CONSOLE is not set
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
-->8--
Any hint is greatly appreciated.
Thanks,
Guenther
PS: Please copy your response to my e-mail address, since I'm not subscribed
to this list (anymore).
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/