>> Hi! >> I have using Brain Boxes UC-260 4xserial port card for many years on > >> Debian 6.0.10 Squeeze. Now I have build a new box with this card for >> Stretch and I recognize that old "tricks" are does not work. >> The old recipe was >> /etc/lilo.conf >> append="8250.nr_uarts=8" > > If I'm reading <https://www.kernel.org/doc/html/v4.10/admin-guide/kernel- parameters.html> correctly, the correct command line parameter is just > "nr_uarts=8". So it may be that the kernel is ignoring your command and > only providing you with the default 4. > > >> In result I have 8 nodes for serial devices, up to ttyS7 >> /etc/serial.conf >> /dev/ttyS4 uart 16750 port 0xd100 irq 20 baud_base 115200 spd_normal >> skip_test ^fourport >> /dev/ttyS5 uart 16750 port 0xd108 irq 20 baud_base 115200 spd_normal >> skip_test ^fourport >> /dev/ttyS6 uart 16750 port 0xd110 irq 20 baud_base 115200 spd_normal >> skip_test ^fourport >> /dev/ttyS7 uart 16750 port 0xd118 irq 20 baud_base 115200 spd_normal >> skip_test ^fourport >> Thats all. Every port are working well. >> With stretch it does not work at all. >> After reboot, from command line: >> $ setserial /dev/ttyS4 -a >> Invalid argument >> >> Same command but as root: >> # setserial /dev/ttyS4 -a >> /dev/ttyS4, Line 4, UART: 16750, Port: 0xd100, IRQ: 20 >> Baud_base: 115200, close_delay: 50, divisor: 0 >> closing_wait: 3000 >> Flags: spd_normal skip_test >> >> Seem to be work? - not yet, using minicom it can not receive even himself >> (sort cut pins 2-3 w/o any handshake). Port address and irq was taken >> from lspci and proved by windows 10 running on the same box. >> I cleaned up /etc/serial.conf as this card does not exist at all. >> I tried to setup serial by hand: >> # setserial /dev/ttyS4 uart 16550A port 0xd100 irq 20 baud_base 115200 spd_normal skip_test >> Invalid argument
>> The error seem less in kernel log. >> I have tried several settings - decide which argument is wrong. At last >> turn out that /dev/ttyS4, the device node is invalid, I can set it as >> /dev/ttyS1 (no such a "standard" port in my box), but card still wont >> work. >> I have tried several Debian live Strecth and Jessie distros with the same >> result. I have also tried SystemRescue CD with more up to date kernel but >> got the same result. >> I also lookup the manufacturer suggested "driver" - in real it is only >> some patches in grub and rc.local but it still does not work. >> In windows 10 it is work well. >> I was submitted a bug report to Debian about the setserial, but I'm not >> sure that it is setserial problem, I suspect kernel? >> I have no idea what to do more. Any suggestion would be highly >> appreciated. I'm not too good in kernel debugging. >> >> Sincerely >> tovis Thanks Darac! This working well >> /etc/lilo.conf >> append="8250.nr_uarts=8" Result is # ls /dev/ttyS* /dev/ttyS0 /dev/ttyS1 /dev/ttyS2 /dev/ttyS3 /dev/ttyS4 /dev/ttyS5 /dev/ttyS6 /dev/ttyS7 I was changed that to /etc/lilo.conf append="nr_uarts=8" It does not work at all! # ls /dev/ttyS* /dev/ttyS0 /dev/ttyS1 /dev/ttyS2 /dev/ttyS3 Something is missing on kernel.org web page - really strange!
