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Bug#610598: marked as done (Radeon RV250 (Mobility FireGL 9000) needs KMS disabled)

Your message dated Thu, 20 Jan 2011 13:35:45 +0100
with message-id <20110120123545.GR30701@radis.liafa.jussieu.fr>
and subject line Re: Bug#610598: Radeon RV250 (Mobility FireGL 9000) needs KMS disabled
has caused the Debian Bug report #610598,
regarding Radeon RV250 (Mobility FireGL 9000) needs KMS disabled
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
610598: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610598
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: debian-installer
Version: 20110106+b1


HARDWARE:

This is on a 2004 Laptop with the following video hardware:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV250 [Mobility FireGL 9000] (rev 01) (prog-if 00 [VGA controller])
        Subsystem: Uniwill Computer Corp Device 2301
        Flags: bus master, stepping, 66MHz, medium devsel, latency 64,
	IRQ 16
        Memory at d0000000 (32-bit, prefetchable) [size=128M]
        I/O ports at b000 [size=256]
        Memory at ffcf0000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at ffcc0000 [disabled] [size=128K]
        Capabilities: [58] AGP version 2.0
        Capabilities: [50] Power Management version 2


INSTALLER:

The debian squeeze installer as of Jan 14 on i386
(Selections: Laptop, Graphical User Interface).


BUG+SOLUTION:

The installer enables kernel mode-switching (KMS).
This causes the "radeon" module of the X server to end in a blank,
but back-lighted, screen. The computer is unusable.

The solution that worked for me:
   echo options radeon modeset=0 > /etc/modprobe.d/radeon-kms.conf


COMPLICATIONS:

In several tries I found no way to get to a working commandline
from the grub prompt. Anything I tried got the screen blanked
during the boot process.

This made it a particularly nasty bug. In the end, I hit Ctrl-C
several times during boot, got a single-user prompt but without
network connection, dinstalled gdm3, rebooted, and installed the
ssh daemon.

What didn't work to get a commandline:
 o The 'safe' boot choice in grub.
 o Changing the 'quiet' option in grub's kernel commandline
   to 'single', 'Single', 'S', '3', '1'.
 o Using the following options in grub:
   'vga=none', 'nomodeset'
 o The Ctrl-Alt-F1 combination once the screen was blanked.

AFFECTED PACKAGES:

I'm not sure who should fix this particular problem:
 - installer should configure radeon without KMS
 - grub should have a working option to get to a commandline
   boot without any graphics mode switching or X
 - kernel should honor the nomodeset parameter
 - xserver-xorg-video-radeon should not use KMS by default
 - the new init scripts should have a documented way to
   get to a non-X mode


-- 
Claus Fischer <claus.fischer@clausfischer.com>
http://www.clausfischer.com/

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--- Begin Message --- 
On Thu, Jan 20, 2011 at 13:21:30 +0100, Claus Fischer wrote:

> On Thu, Jan 20, 2011 at 12:38:17PM +0100, Julien Cristau wrote:
> : On Thu, Jan 20, 2011 at 12:02:55 +0100, Claus Fischer wrote:
> : 
> : > The installer enables kernel mode-switching (KMS).
> : > This causes the "radeon" module of the X server to end in a blank,
> : > but back-lighted, screen. The computer is unusable.
> : > 
> : Did you file a bug about this?
> 
> Only with the installer - since I don't know whether the appropriate
> solution is to configure the module on install, or to have the module
> behave correctly.
> 
Well there's no bug in the installer here, so I'm closing this one.

> Should I file with the radeon module too?
> 
Probably.  Please describe your issue in more details there though: does
the console work before starting X, or do you get a black screen
directly on boot?  Does 2.6.37 work better?

Cheers,
Julien

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