Bug 140848

Summary: [PATCH] wrong mode timings in vga16fb.c require "nofb" installation
Product: Red Hat Enterprise Linux 3 Reporter: Martin Wilck <martin.wilck>
Component: kernelAssignee: Peter Martuccelli <peterm>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: petrides, riel, shillman
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-01-23 19:08:33 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
patch that fixes the problem
none
patch for kernel 2.6 none

Description Martin Wilck 2004-11-25 15:08:55 UTC
Description of problem:

The mode timings of the default 640x480-60 mode in
drivers/video/vga16fb.c do not work with some LCD displays 
because they deviate slightly from the standard. In particular, the
screen height is wrong (529 vs. 525 pixels)

Version-Release number of selected component (if applicable):
2.4.21-20.EL and all others

How reproducible:
E.g. Installing RH on a system with an LCD screen that can't hanlde
slightly wrong VGA timings, without the "nofb" installation option.

Steps to Reproduce:
1.Install RH 

Actual results:
Screen will become black (or garbled, depending on display device)
after loader starts


Expected results:
Screen remains readable

Additional info:
I'll attach a patch. Problem was already discussed on the
linux-fbdev-devel mailing list.

Comment 1 Martin Wilck 2004-11-25 15:11:11 UTC
Link to linux-fbdev-devel thread:

http://marc.theaimsgroup.com/?t=110128742300004&r=1&w=2

Comment 2 Martin Wilck 2004-11-25 15:12:10 UTC
Created attachment 107461 [details]
patch that fixes the problem

Comment 3 Martin Wilck 2004-11-25 15:12:53 UTC
Created attachment 107462 [details]
patch for kernel 2.6

Comment 5 Peter Martuccelli 2007-01-23 19:08:33 UTC
Closing out as wontfix for RHEL3.