Messages in this thread | | | Date | Thu, 3 Jan 2013 13:11:56 +0000 | From | Alan Cox <> | Subject | Re: 3.8-rc2: EFI framebuffer lock inversion... |
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On Thu, 3 Jan 2013 20:56:30 +0800 Daniel J Blueman <daniel@quora.org> wrote:
> On 3.8-rc2 with lockdep enabled and dual-GPU setup (Macbook Pro > Retina), I see two releated lock inversion issues with the EFI > framebuffer, leading to possible deadlock: when X takes over from the > EFI framebuffer [1] and when nouveau releases the framebuffer when > being vgaswitcherood [2]. > > Let me know if you'd like any testing or analysis when I can get the time.
The fb layer locking was broken. I posted patches early December which should have fixed the ones we know about. ('fb: Rework locking to fix lock ordering on takeover').
Alan
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