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Date:      Mon, 01 Feb 2021 13:05:38 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 253159] Display issue on HP Laptop: Can't boot with any FreeBSD
Message-ID:  <bug-253159-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253159

            Bug ID: 253159
           Summary: Display issue on HP Laptop: Can't boot with any
                    FreeBSD
           Product: Base System
           Version: Unspecified
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: pioruns2020@gmx.com

Hi all,

I've tried 3 FreeBSD based distributions on my laptop. Unfortunately, it
doesn't even boot on it, causing CPU to hang completely (I can tell be slowly
blinking Caps which indicates CPU freeze), requiring physical power off and
power on again. I've tried all available safe mode and other options.

Sometimes, it doesn't lock up, but it never goes further than initial boot
menu, after that it's only text console with garbled screen where nothing can
be read, it's just all messed up, instead of text it's all messed up pixels in
inclined bunches where text lines supposed to be.

I think this has something to go with display screen resolution. I have
1366x768 LCD. I remember once wanted to have higher resolution in Linux GRUB
and result was the same, garbled inclined lines and nothing readable.

Hardware is HP Probook, AMD A8-4500M APU with 8GB RAM. GPU is called Radeon HD
7640G (I think it's embedded in this CPU). On Linux, everything is working out
of the box.

Solution: add some safe mode with fixed resolution of 640x480 or something, or
fix underlying problem with display resolution.

Distros tested:
NomadBSD 1.4-RC1 amd64 (based on FreeBSD 12.2)
GhostBSD 21.01.20 amd64 (based on development branch of FreeBSD)
MidnightBSD 2.0.3 amd64 (based on FreeBSD 11)

HW details:
Machine:   Type: Laptop System: Hewlett-Packard product: HP ProBook 4545s v:
A1019D1103 serial: <superuser required> 
           Mobo: Hewlett-Packard model: 17EA v: KBC Version 54.20 serial:
<superuser required> UEFI: Hewlett-Packard 
           v: 68CPD Ver. F.68 date: 03/28/2018 
Battery:   ID-1: BAT0 charge: 20.8 Wh condition: 21.3/21.3 Wh (100%) 
CPU:       Info: Quad Core model: AMD A8-4500M APU with Radeon HD Graphics
bits: 64 type: MCP L2 cache: 2 MiB 
           Speed: 1383 MHz min/max: 1400/1900 MHz Core speeds (MHz): 1: 1383 2:
1387 3: 1384 4: 1382 
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Trinity [Radeon HD 7640G]
driver: radeon v: kernel 
           Device-2: Primax HP HD Webcam [Fixed] type: USB driver: uvcvideo 
           Display: x11 server: X.Org 1.20.10 driver: loaded: ati,radeon
unloaded: modesetting resolution: 1: 1366x768~60Hz 
           2: 1920x1080~60Hz 
           OpenGL: renderer: AMD ARUBA (DRM 2.50.0 / 5.10.7-3-MANJARO LLVM
11.0.1) v: 4.3 Mesa 20.3.3

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