This is an issue with Grub, ConsoleControl was part of the EDK implementation and is not in UEFI or PI specs.
Sent from my iPhone On Oct 1, 2012, at 2:43 AM, Laszlo Ersek <ler...@redhat.com> wrote: > Hi, > > during my recent testing with Fedora 18 Alpha on qemu-kvm + OVMF I > noticed that there's a very short graphics glitch on the *textual* grub2 > welcome screen. Basically one or two lines are printed, one of which > looks like "Welcome to GRUB!", and then the screen falls apart like in a > packed vs. planar pixel format misunderstanding [1]. It goes away in > less than one second and the graphical grub2 UI works fine. > > I think it happens in > > grub_main [grub-core/kern/main.c] > grub_machine_init [grub-core/kern/i386/efi/init.c] > grub_efi_init [grub-core/kern/efi/init.c] > grub_console_init [grub-core/term/efi/console.c] > grub_efi_set_text_mode [grub-core/kern/efi/efi.c] > > The last function calls > EFI_CONSOLE_CONTROL_PROTOCOL.SetMode(EfiConsoleControlScreenText) [2]. > > According to [3], this protocol is not supported anymore by edk2, but > the referenced grub2 code neither returns cleanly nor crashes, it > changes the video mode to something wrong (for a very short while). When > I grep the edk2 tree for EFI_CONSOLE_CONTROL_PROTOCOL, the only relevant > hits seem to be > > EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c > EdkCompatibilityPkg/Foundation/Library/Dxe/GraphicsLite/Graphics.c > EdkCompatibilityPkg/Foundation/Protocol/ConsoleControl/ConsoleControl.c > EdkCompatibilityPkg/Foundation/Protocol/ConsoleControl/ConsoleControl.h > > none of which is built for OvmfPkg. > > Is this a problem with grub2 or OvmfPkg? > > Thanks, > Laszlo > > [1] > http://people.redhat.com/~lersek/Screenshot-fw-ovmf.g-f18xfcealpha.e-rhel63%20Virtual%20Machine.png > [2] > http://bzr.savannah.gnu.org/lh/grub/trunk/grub/annotate/4542/grub-core/kern/efi/efi.c#L119 > [3] > http://sourceforge.net/mailarchive/forum.php?thread_name=EC94AF25-B8AA-43DB-905F-67D42330A5C4%40apple.com&forum_name=edk2-devel ------------------------------------------------------------------------------ Got visibility? Most devs has no idea what their production app looks like. Find out how fast your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219671;13503038;y? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel
