Bug 28217

Summary:

Black screen and crash on r600 with radeon module not loaded

Product:

DRI

Reporter:

Gael Le Mignot <kilobug>

Component:

DRM/Radeon

Assignee:

Default DRI bug account <dri-devel>

Status:

RESOLVED MOVED

QA Contact:

Severity:

normal

Priority:

medium

Version:

XOrg git

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Xorg log with no manual loading of radeon module	none
Xorg log with manual loading of radeon module	none
dmesg log with no manual loading of radeon module	none
dmesg log with manual loading of radeon module	none

Description Gael Le Mignot 2010-05-23 04:48:03 UTC

If the radeon kernel module isn't loaded, starting Xorg gives me a black screen and I need to do a hard reboot (reset).

I've a HD4650 radeon, so it's r600 driver. This didn't happen with my old Radeon 9250, but I did upgrade X and kernel at the same time (to have r600 support), so not sure if it's related to hardware or to more recent X.

I'm using Debian GNU/Linux with 64-bits kernel and 32-bits userland and :

- xserver-xorg-video-radeon version 1:6.13.0-2

- xserver-xorg version 1:7.5+6

- libgl1-mesa-dri version 7.8.1-1

- kernel 2.6.33-2-amd64

Comment 1 Alex Deucher 2010-05-23 09:10:24 UTC

Please attach your xorg log and dmesg output.

Comment 2 Gael Le Mignot 2010-05-24 10:56:23 UTC

Created attachment 35828 [details]
Xorg log with no manual loading of radeon module

Comment 3 Gael Le Mignot 2010-05-24 10:56:50 UTC

Created attachment 35829 [details]
Xorg log with manual loading of radeon module

Comment 4 Gael Le Mignot 2010-05-24 10:57:17 UTC

Created attachment 35830 [details]
dmesg log with no manual loading of radeon module

Comment 5 Gael Le Mignot 2010-05-24 10:57:41 UTC

Created attachment 35831 [details]
dmesg log with manual loading of radeon module

Comment 6 Gael Le Mignot 2010-05-24 10:59:16 UTC

I managed to get the logs using network (since without the radeon module, I have black screen and I get a system freeze whenever I try to switch to text console).

It seems that when I don't load the radeon module manually from /etc/modules, it gets loaded automatically later in the boot process, and Xorg isn't happy with that.

Maybe a timing issue ?

Comment 7 Alex Deucher 2010-05-24 11:13:58 UTC

Are you trying to use ums rather than kms?  You need to disable kms if you want to use ums.  (boot with radeon.modeset=0).  If you want to use kms, the drm must be loaded before starting X.

Comment 8 Gael Le Mignot 2010-06-26 04:54:48 UTC

Well, I understand KMS won't work without the radeon module loaded, but it shouldn't crash, it should give an error message. Starting X with KMS enabled but module not loaded should either fail with an error message or fallback to UMS, but it shouldn't freeze the computer.

The weird part is that even if I don't load the module, it gets loaded automatically when X starts, but I still have a crash.

It's not a major bug since manually loading radeon fixes it, but it's still annoying when you have a crash and not clear hint on how to fix it.

Comment 9 Martin Peres 2019-11-19 08:12:52 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/127.

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