On 10/26/20 7:06 PM, Michael Olbrich wrote: > On Tue, Oct 20, 2020 at 09:35:30AM +0200, Ahmad Fatoum wrote: >> On 10/20/20 9:26 AM, Uwe Kleine-König wrote: >>> On Tue, Oct 20, 2020 at 07:08:47AM +0200, Ahmad Fatoum wrote: >>>> Hello Uwe, >>>> >>>> On 9/18/20 1:04 PM, Uwe Kleine-König wrote: >>>>> For most machines having DRIVER_SERIAL_NS16550 and DRIVER_SERIAL_EFI_STDIO >>>>> both enabled results in the output appearing twice on the serial output. >>>>> So remove disable the lowlevel driver and rely on the EFI bios for serial. >>> >>> How embarrassing, s/remove //. >>> >>>> On the flip-side, some systems now won't output anything over serial with >>>> the defconfig, like the one I just ran into. Maybe we should keep both >>>> enabled, but have a quirk table, which boards to disable the 16550 for? >>> >>> Expecting that most systems are happy with EFI_STDIO I would suggest a >>> quirk table for those systems which are not?! >> >> Doubled output is better than no output, so a defconfig that >> by default displays anything if the BIOS is not in the quirk >> table sounds like it's the better choice? > > Maybe disable CONSOLE_ACTIVATE_ALL instead? Then you should only get the > output from one driver. And which one should be default? You'll get more compile time coverage with the defconfig but the user experience problem of having a defconfig that does print nothing at all on some devices is still there. > > Michael > >>> >>>> My board is >>>> EFI v2.40 by American Megatrends v327691". What's yours? >>>> barebox@barebox EFI payload:/ devinfo acpi-FACP0 >>>> [...] >>>> Revision: 5 >>>> OemId: ALASKA >>>> OemTableId: A M I >>>> OemRevision: 17244169 >>>> CreatorId: 0x20494d41 >>>> CreatorRevision: 65555 >>>> >>>> What's yours? >>> >>> I saw the doubled output on my Laptop (Lenovo T460p). >> >> You have serial output on your laptop? >> >>> >>> dmidecode has: >>> >>> BIOS Information >>> Vendor: LENOVO >>> Version: R07ET81W (2.21 ) >>> Release Date: 12/18/2017 >>> Address: 0xE0000 >>> Runtime Size: 128 kB >>> ROM Size: 16 MB >>> Characteristics: >>> PCI is supported >>> PNP is supported >>> BIOS is upgradeable >>> BIOS shadowing is allowed >>> Boot from CD is supported >>> Selectable boot is supported >>> EDD is supported >>> 3.5"/720 kB floppy services are supported (int 13h) >>> Print screen service is supported (int 5h) >>> 8042 keyboard services are supported (int 9h) >>> Serial services are supported (int 14h) >>> Printer services are supported (int 17h) >>> CGA/mono video services are supported (int 10h) >>> ACPI is supported >>> USB legacy is supported >>> BIOS boot specification is supported >>> Targeted content distribution is supported >>> UEFI is supported >>> BIOS Revision: 2.21 >>> Firmware Revision: 1.4 >>> >>> (This is the system I write this mail on, I don't feel like rebooting to check >>> devinfo in barebox, take a picture and then type the stuff into a mail >>> by hand.) >>> >>> Best regards >>> Uwe >>> >>> >> >> -- >> Pengutronix e.K. | | >> Steuerwalder Str. 21 | http://www.pengutronix.de/ | >> 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | >> Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | >> >> _______________________________________________ >> barebox mailing list >> barebox@xxxxxxxxxxxxxxxxxxx >> http://lists.infradead.org/mailman/listinfo/barebox >> > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
