port-arm/53342: HDMI screen sees garbled text with raspberry pi 2 armv7 8.0_RC1

[mayuresh%acm.org@localhost]

>Number:         53342
>Category:       port-arm
>Synopsis:       HDMI screen sees garbled text with raspberry pi 2 armv7 8.0_RC1
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 05 14:05:00 +0000 2018
>Originator:     Mayuresh
>Release:        8.0_RC1
>Organization:
>Environment:
NetBSD armv7 8.0_RC1 NetBSD 8.0_RC1 (RPI2.201804240813Z) evbarm

>Description:
On booting 8.0_RC1 on raspberry pi 2, the text on hdmi screen gets garbled as it scrolls. After inactivity for some time on the monitor the text suddenly becomes normal again.
>How-To-Repeat:
Boot above release on raspberry pi 2 with hdmi screen connected.
>Fix:
Not known