Source: linux Version: 4.11.6-1 Severity: normal Dear Maintainer,
on some amd64 systems no native or PCI(e) serial ports are available resp. possible. USB serial adapters are the only option to get a serial console for debugging boot problems in this case. Unfortunately the Debian amd64 kernels are built with USB_SERIAL_CONSOLE unset (because USB_SERIAL is not built-in) so even that option isn't available. When the BIOS text mode isn't working (e.g. high-res monitor with a BIOS that only supports up to FullHD) one is left without any working console device. So please enable USB_SERIAL_CONSOLE (requires USB_SERIAL=y) for future kernels and consider setting one of the USB serial adapter drivers to built-in as well so that it's available before module loading. But even just USB_SERIAL_CONSOLE alone (with all USB serial drivers as modules) is likely better than the current situation; AFAICT the USB serial console should get activated as soon the the USB serial driver is loaded (haven't tested it, though). Sascha -- System Information: Debian Release: 8.8 APT prefers oldstable APT policy: (990, 'oldstable'), (500, 'oldstable-updates'), (100, 'stable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.9.0-0.bpo.2-amd64 (SMP w/4 CPU cores) Locale: LANG=en_GB, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)
