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When multiple GOP devices exists, but none of them implements ConOut, the code should just choose the first GOP (according to the comments). But currently 'fb_base' will refer to the last GOP, while other parameters to the first GOP, which will likely result in a garbled display. I can reliably reproduce this bug using my ASRock Z87M Extreme4 motherboard with CSM and integrated GPU disabled, and two PCIe video cards (NVidia GT640 and GTX980), booting from efi-stub (booting from grub works fine). On the primary display the ASRock logo remains and on the secondary screen it is garbled up completely. Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Cc: <stable@vger.kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1444659236-24837-2-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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