xorg broken on Beaglebone black revision 300438

[Ian Lepore]

On Mon, 2016-05-23 at 21:05 -0300, Otacílio wrote:
> Dears
> 
> Yesterday I build a new  image with the revision 300438 to my
> Beaglebone 
> black. I'm using the same package of scfb and configuration to xorg, 
> but, with this new revision, xcfe do not works. After open xfce the 
> mouse stucks on the top left corner and panels shows black belts and 
> squares on chars. I did a small modification on the kernel but is not
> clear to me that this can cause this erroneous behavior.  The 
> modification, xorg.conf, and Xlog from revision r298522 (works) and 
> revision 300438 (don't works). If you agree I will open a bug.
> 
> Index: sys/arm/arm/locore-v6.S
> ===================================================================
> --- sys/arm/arm/locore-v6.S    (revision 300438)
> +++ sys/arm/arm/locore-v6.S    (working copy)
> @@ -134,8 +134,8 @@
>       bic    r7, #CPU_CONTROL_IC_ENABLE
>       bic    r7, #CPU_CONTROL_BPRD_ENABLE
>       bic    r7, #CPU_CONTROL_SW_ENABLE
> -    orr    r7, #CPU_CONTROL_UNAL_ENABLE
> -    orr    r7, #CPU_CONTROL_AFLT_ENABLE
> +    bic    r7, #CPU_CONTROL_UNAL_ENABLE
> +    bic    r7, #CPU_CONTROL_AFLT_ENABLE
>       orr    r7, #CPU_CONTROL_VECRELOC
>       mcr    CP15_SCTLR(r7)
>       DSB
> @@ -458,8 +458,8 @@
>       bic    r0, #CPU_CONTROL_IC_ENABLE
>       bic    r0, #CPU_CONTROL_BPRD_ENABLE
>       bic    r0, #CPU_CONTROL_SW_ENABLE
> -    orr    r0, #CPU_CONTROL_UNAL_ENABLE
> -    orr    r0, #CPU_CONTROL_AFLT_ENABLE
> +    bic    r0, #CPU_CONTROL_UNAL_ENABLE
> +    bic    r0, #CPU_CONTROL_AFLT_ENABLE
>       orr    r0, #CPU_CONTROL_VECRELOC
>       mcr    CP15_SCTLR(r0)
>       DSB
> 

I cannot tell from your message whether you mean that this change
(disabling alignment faults) did, or did not, fix the problem.

I have been testing a change just like this today (for other reasons,
nothing to do with beaglebone or X), and it's likely to be committed
soon.

-- Ian