Thinkpad T61 running 8.04 with the serial+parallel adapter for the ultrabay-slim (pass through connectors to the mainboard's 8250 serial adapter).
After boot, the serial port works. However, after a suspend resume it disappears and the kernel emits "ttyS0: LSR safety check engaged!". workaround: boot with the kernel option: pnpacpi=off misc notes, hints, and guesswork: - Looking at my udev log, I saw that the 8250 serial port is detected and activated. And right after that, the pnp code detected and activated the serial port again. Hmmnn... ''' UEVENT[1227045158.127887] add /bus/platform/drivers/serial8250 (drivers) ACTION=add DEVPATH=/bus/platform/drivers/serial8250 SUBSYSTEM=drivers SEQNUM=1893 UEVENT[1227045158.127898] add /bus/pnp (bus) ACTION=add DEVPATH=/bus/pnp SUBSYSTEM=bus SEQNUM=1894 UEVENT[1227045158.127904] add /bus/pnp/drivers/serial (drivers) ACTION=add DEVPATH=/bus/pnp/drivers/serial SUBSYSTEM=drivers SEQNUM=1895 ''' - After disabling pnpacpi the "/sys/bus/pnp/devices/" node is empty, but "/sys/bus/platform/devices/serial8250/tty/" is populated. - Also, my lspci shows an LPC bus via ISA bridge as someone else noted above: 00:1f.0 ISA bridge: Intel Corporation 82801HBM (ICH8M-E) LPC Interface Controller (rev 03) -- Serial ports on HP NC6000 and NW8000 don't work https://bugs.launchpad.net/bugs/74034 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
