On 08/04/15 15:54, Andrei Borzenkov wrote: > On Wed, Apr 8, 2015 at 3:52 PM, Jelle de Jong <[email protected]> > wrote: >> >> So my question is, can I use an PCI or PCI-E serial adapter (specific >> drivers?) to make sure the GRUB serial output is shown. >> > > grub supports standard ns8250 UART; it will probe for the first 4 > ports. As long as your PCI card is compatible and can be set to answer > to one of first COM ports address, it has good chances to work.
I think I use a generic pci serial adaptor, how can I figure this out? 37:09.0 Serial controller [0700]: Titan Electronics Inc VScom 100L 1 port serial adaptor [14d2:8010] # grep tty /var/log/dmesg [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=UUID=705b5c0f-4274-459f-ba16-60dc64d27eac ro console=ttyS0,115200 quiet [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=UUID=705b5c0f-4274-459f-ba16-60dc64d27eac ro console=ttyS0,115200 quiet [ 0.000000] console [ttyS0] enabled [ 2.348085] 0000:37:09.0: ttyS0 at I/O 0xe008 (irq = 21) is a 16550A http://en.wikipedia.org/wiki/16550_UART http://en.wikipedia.org/wiki/8250_UART "Both the computer hardware and software interface of the 16550 are backward compatible with the earlier 8250 UART" > _______________________________________________ > Help-grub mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/help-grub _______________________________________________ Help-grub mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-grub
