Bug 21284 - [KMS] Radeon rv280 black screen with modeset=1
Summary: [KMS] Radeon rv280 black screen with modeset=1
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: DRI git
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2009-04-19 09:02 UTC by Andrew Randrianasulu
Modified: 2013-03-15 10:12 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

some lines from /var/log/debug (13.85 KB, text/html)
2009-04-19 09:06 UTC, Andrew Randrianasulu
no flags Details
few lines from /var/log/messages (1.63 KB, text/html)
2009-04-19 09:08 UTC, Andrew Randrianasulu
no flags Details
X.org log from working userspace driver (with non-KMS drm) (41.88 KB, text/plain)
2009-04-19 09:09 UTC, Andrew Randrianasulu
no flags Details

Description Andrew Randrianasulu 2009-04-19 09:02:03 UTC
Not sure if you accept bugs in radeon/KMS code, but because it was working before (when radeon KMS in Airlied's tree was based on 2.6.27-something) and now it broke n ... just for not losing this case i will enter some details here. 

My hardware:

01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 SE] (rev 01) (prog-if 00 [VGA controller])
        Subsystem: Hightech Information System Ltd. Excalibur 9200SE VIVO 128M
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16
        Memory at c8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at b800 [size=256]
        Memory at d7ef0000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at d7ec0000 [disabled] [size=128K]
        Capabilities: [58] AGP version 2.0
        Capabilities: [50] Power Management version 2
        Kernel driver in use: radeon
        Kernel modules: radeonfb

It works fine with current xf86-video-ati, with single VGA output connected to CRT monitor.

I have drm-rawhide tree, up to commit 5d9a97d1d81e5d0c0115e01d7a1cf7b3f72b3c0d "Author: Dave Airlie <airlied@redhat.com>
Date:   Fri Apr 17 20:49:35 2009 +1000

    drm: add missing helper commit"

Kernel compiles and boots fine, but if i load radeon.ko with modeset=1 parameter i got only black screen (but it doesn't saying "No signal")
Comment 1 Andrew Randrianasulu 2009-04-19 09:06:31 UTC
Created attachment 24944 [details]
some lines from /var/log/debug

drm.ko was loaded with debug=1 of cource
Comment 2 Andrew Randrianasulu 2009-04-19 09:08:40 UTC
Created attachment 24945 [details]
few lines from /var/log/messages

Looks like AGP working OK, guessing from "[drm] writeback test succeeded in 1 usecs" line .. I can be wrong here.
Comment 3 Andrew Randrianasulu 2009-04-19 09:09:58 UTC
Created attachment 24946 [details]
X.org log from working userspace driver (with non-KMS drm)
Comment 4 Andrew Randrianasulu 2009-05-01 14:13:43 UTC
Sorry, it was configuration issue. If i ran "modprobe fbcon" manually - it works.
Comment 5 chemtech 2013-03-15 07:53:24 UTC
Andrew Randrianasulu,
Please attach full dmesg and output of lspci -vv
Please check the status of your issue.
Comment 6 Andrew Randrianasulu 2013-03-15 10:12:37 UTC
Sorry, I  completely  forgot  about  it!

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