Hi, I have an Intel Atom E3930 system, /dev/ttyS6 device node is no longer exposed to the userspace starting from 4.15+ Ubuntu kernels.
BTW, it works fine on Debian kernels, for example on 4.16.0-2-amd64
I've tried supposed linux-oem-4.15.0-1006.9 but device node is still missing, although appears in /proc/tty/driver/serial
$ uname -r 4.15.0-1006-oem
$ sudo cat /proc/tty/driver/serial | grep -v unknown serinfo:1.0 driver revision: 4: uart:16550A mmio:0x7FFFF16000 irq:4 tx:0 rx:0 5: uart:16550A mmio:0x7FFFF14000 irq:5 tx:0 rx:0 RTS|CTS|DTR 6: uart:16550A mmio:0x280000000 irq:6 tx:0 rx:0 RTS|DTR 7: uart:16550A mmio:0x7FFFF12000 irq:7 tx:0 rx:0 CTS
$ stat /dev/ttyS6 stat: cannot stat '/dev/ttyS6': No such file or directory
Hi,
I have an Intel Atom E3930 system, /dev/ttyS6 device node is no longer exposed to the userspace starting from 4.15+ Ubuntu kernels.
BTW, it works fine on Debian kernels, for example on 4.16.0-2-amd64
I've tried supposed linux-oem- 4.15.0- 1006.9 but device node is still missing, although appears in /proc/tty/ driver/ serial
$ uname -r
4.15.0-1006-oem
$ sudo cat /proc/tty/ driver/ serial | grep -v unknown
serinfo:1.0 driver revision:
4: uart:16550A mmio:0x7FFFF16000 irq:4 tx:0 rx:0
5: uart:16550A mmio:0x7FFFF14000 irq:5 tx:0 rx:0 RTS|CTS|DTR
6: uart:16550A mmio:0x280000000 irq:6 tx:0 rx:0 RTS|DTR
7: uart:16550A mmio:0x7FFFF12000 irq:7 tx:0 rx:0 CTS
$ stat /dev/ttyS6
stat: cannot stat '/dev/ttyS6': No such file or directory