Gentoo Archives: gentoo-alpha

From: Don Wilburn <bodhisattva@×××××.com>
To: gentoo-alpha@l.g.o
Subject: [gentoo-alpha] radeonfb question
Date: Fri, 26 Dec 2014 22:33:30
In Reply to: [gentoo-alpha] Re: radeon questions by "Måns Rullgård"
1 Alpha list,
3 This may not be alpha-specific. I don't know. Perhaps Gentoo has an
4 appropriate forum?
6 To make my radeon work, I had to build the X driver into the kernel.
7 This forced me to build a radeonfb module. The framebuffer module makes
8 my console 1280x1024 32bit with 160x64 text.
9 I would really, really, really prefer something else on my 17"
10 non-widescreen monitor. I can't figure out a way to do it.
12 For X, xrandr can switch to a variety of auto-detected modes. The
13 console framebuffer only gives one choice by default. So, I tried fbset
14 and /etc/fb.modes. Regardless of geometry, the only timings line that
15 works is 0 0 0 0 0 0 0. For example
17 mode "800x600"
18 geometry 800 600 800 600 24
19 timings 25000 88 40 23 1 128 4
20 hsync high
21 vsync high
22 endmode
24 That gives "ioctl FBIOPUT_VSCREENINFO: Invalid argument" as a result.
25 The timings listed are from formula and are confirmed by an old example
26 posted at
27 (800x600 60HZ)
28 Changing timings to all zeroes removes the error, but gives me an
29 800x600 piece of a 1280x1024 screen.
31 So, I tried passing a parameter to the module. The kernel loads it
32 automatically while booting. I made a radeonfb.conf file in
33 /etc/modeprobe.d, but nothing worked.
34 It seems strange that I can rmmod radeonfb and fb_ddc and the console
35 remains unaffected.
37 What am I missing? Is it not possible to change my console resolution?
38 I need help.
40 Thanks, DW


Subject Author
Re: [gentoo-alpha] radeonfb question solved Don Wilburn <bodhisattva@×××××.com>