Date: Tue, 10 Feb 2009 03:12:50 GMT From: Justin Hibbits <jrh29@alumni.cwru.edu> To: freebsd-gnats-submit@FreeBSD.org Subject: powerpc/131548: ofw_syscons no longer supports 32-bit framebuffer Message-ID: <200902100312.n1A3CoUN006803@www.freebsd.org> Resent-Message-ID: <200902100320.n1A3K1Yh047070@freefall.freebsd.org>
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>Number: 131548 >Category: powerpc >Synopsis: ofw_syscons no longer supports 32-bit framebuffer >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-ppc >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Feb 10 03:20:01 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Justin Hibbits >Release: 8.0-CURRENT >Organization: >Environment: FreeBSD narn.knownspace 8.0-CURRENT FreeBSD 8.0-CURRENT #2 r188149M: Mon Feb 9 18:45:09 EST 2009 root@narn.knownspace:/usr/obj/usr/src/sys/NARN powerpc >Description: The change made in r186055 forces a display reset, which causes OpenFirmware to reset the display controller to boot-time settings. Unfortunately, with a 32-bit color depth, OpenFirmware resets the display to 8-bit, causing the ofw_syscons code to draw 4 physical pixels for one logical pixel. This causes lines to wrap, and also causes text to wrap below the visible screen. Another bug, discussed on the ppc@ mailing list, is shown by this, as the system hangs very shortly after bootup, possibly due to memory corruption by overlapping pages in the video buffer and RAM. >How-To-Repeat: Add: dev screen 32 set-depth To sys/boot/powerpc/boot1.chrp/bootinfo.txt, or run at the OFW prompt. ATI cards only (tested with Radeon 9600pro) >Fix: OpenBSD's console code might have something helpful. >Release-Note: >Audit-Trail: >Unformatted:help
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