On 11/30/18 10:13, Udit Kumar wrote: > Thanks Laszlo/Andrew > Finally I manage to get logs from user-space, problem was fifo of PL011 > uart was not getting enable in case of direct boot. > But in case of boot via UiApp, some piece of code was setting serial port > attribute to enable this ( I still to figure out from where). > OS rely on boot-loader to enable this bit.
Are you using the latest edk2? I vaguely recall some refactoring around PL011 (and in general, serial) attributes from a year (or more?) ago. Hmm.... b462f25a21e1 MdeModulePkg/SerialDxe: Describe correctly EFI_DEVICE_ERROR for SetAttributes 13d378fc82d4 MdeModulePkg/SerialDxe: Fix return valued in SerialSetAttributes 7ce5af40c98b MdeModulePkg/SerialDxe: Do not fail reset when SetAttributes is not supported and 91cc526b15ff MdeModulePkg/SerialDxe: Fix not able to change serial attributes Thanks Laszlo >> -----Original Message----- >> From: Laszlo Ersek <[email protected]> >> Sent: Thursday, November 29, 2018 11:31 PM >> To: Udit Kumar <[email protected]>; [email protected] >> Cc: Ni, Ruiyu <[email protected]>; [email protected]; Zeng, Star >> <[email protected]> >> Subject: Re: [edk2] Help on boot manager 'Boot Manager Menu' and direct boot >> >> On 11/29/18 14:12, Udit Kumar wrote: >>> Thanks Laszlo, >>> >>> >>>> I can only think of some terminal control sequences that are *not* >>>> printed to the terminal when you don't enter UiApp manually. I don't >>>> understand how that could cause the exact symptom you describe, but I have >> no better explanation. >>>> >>>> Can you try other serial communication programs on your desktop? Such >>>> as "minicom" or "screen"? >>> >>> Screen didn't help. >>> Moreover , using different OS distributions show same similar behavior !! >>> >>>> Also, can you try changing your "console=..." kernel param(s)? >>> >>> You meant baud-rate ? >> >> Yes, and more. The options that the "console=" kernel parameter takes. >> >>> >>> On uefi side, could you help me if there is some extra information >>> passed to OS in path UiApp -> BootDevice, >> >> I don't think so. Nothing comes to my mind anyway. >> >>> I could see , some of additional protocols are installed in above >>> path, I am not sure if those are used by OS or OS Loader (grub in my case) >> somehow. >> >> Well, UiApp generally connects all drivers to all devices -- normally a >> platform >> BDS would not want to do this, for the sake of booting quickly --, which >> likely >> results in more protocol instances being installed in the system. That >> shouldn't >> cause a difference for how serial behaves once the OS has booted. >> >> Thanks >> Laszlo _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
