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Message-ID: <cc4ee203-0224-91e3-ef60-7180dfb275ce@lwfinger.net> Date: Wed, 13 Sep 2017 19:55:20 -0500 From: Larry Finger <Larry.Finger@...inger.net> To: Andrew Donnellan <andrew.donnellan@....ibm.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...abs.org> Cc: linuxppc-dev@...ts.ozlabs.org, LKML <linux-kernel@...r.kernel.org> Subject: Re: Regression for Power PC in 4.14-rc0 - bisected to commit 31bfdb036f12 On 09/13/2017 07:37 PM, Andrew Donnellan wrote: > On 14/09/17 10:07, Larry Finger wrote: >> When booting my PowerBook Aluminum G4, I get a pop-up screen that says "The >> system is running in low-graphics mode. Your screen, graphics card, and input >> device settings could not be detected correctly. You will need to configure >> these yourself." This is a big-endian 74xx CPU. The lscpu command says it is a >> PowerBook5,6 model. >> >> This problem has been bisected to commit 31bfdb036f12 ("powerpc: Use >> instruction emulation infrastructure to handle alignment faults"). I am >> confident of the accuracy of the bisection. >> >> Attached is the configuration. > > Try with https://patchwork.ozlabs.org/patch/813153/ > > (A selftest for the instruction emulation will make its way upstream eventually...) That patch does fix my problem. Thanks for the quick response. Larry
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