linux-kernel - Re: Regression for Power PC in 4.14-rc0

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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