Bug 13720

Summary:	[2.6.30] Modesetting on Mobility Radeon X700 displays black screen
Product:	Drivers	Reporter:	Ken Lewis (kenlewis)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	alan, alexdeucher
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.30-rc1	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	dmesg output with r4xx_atom=1 set verbose lspci output .config file for kernel build used video bios file Fix quirk handling for MSI laptop Dmesg with working KMS output.

Description Ken Lewis 2009-07-06 10:47:02 UTC

Using the new import of Dave Airlie's Radeon KMS DRI driver, my laptop screen (LVDS-connected) goes blank and stays blank while using KMS and modeset=1.

Chip is a Modility Radeon X700 in a MSI Megabook M635 (also known as MS-1029) with a Turion 64 chip running X86-64 userland from Ubuntu (in particular, Karmic Koala and Kubuntu KDE4).  I build my own kernels from mainline to test and will attach dmesg output, Xorg.0.log output (which also apes the Kernel's can't inability to find the LVDS connector -- don't be confused, I'm not complaining about X.org here), and dmesg output.  r4xx_atom does not need to be forced: from reading the source and logs, the chip is identified as ATOMBIOS.

In my own disgnosis, I found that there is a quirk that matches this notebook in driver/gpu/drm/atombios.c but it is not used.  Also, the drm.debug=1 option shows that the VGA and LVDS connectors are identified but no connector is assigned to the LVDS encoder, which I believe is why the screen is blank.

Comment 1 Alex Deucher 2009-07-06 14:12:21 UTC

This is probably a dupe of bug 13683.  r4xx_atom is still a valid option to try.  While r4xx cards have an atombios that atom command tables are not used for programming the mode unless the r4xx_atom option is set.  Please attach your dmesg with the debug option set for the drm module.

Comment 2 Ken Lewis 2009-07-06 14:58:26 UTC

I don't think it's a dupe of that because the reported experience differs: I see no mouse cursor and no powersaving effects correct the lack of an image on-screen.  A bit of googling indicates that my laptop has different hardware -- I'm using ATIIXP audio instead of a Via 82XX (see http://www.linlap.com/wiki/fujitsu+amilo+a1667g).

Comment 3 Ken Lewis 2009-07-06 14:59:17 UTC

Created attachment 22233 [details]
dmesg output with r4xx_atom=1 set

Comment 4 Ken Lewis 2009-07-06 14:59:48 UTC

Created attachment 22234 [details]
verbose lspci output

Comment 5 Ken Lewis 2009-07-06 15:02:12 UTC

Created attachment 22235 [details]
.config file for kernel build used

Comment 6 Ken Lewis 2009-07-06 15:03:09 UTC

Please s/'driver/gpu/drm/atombios.c'/'driver/gpu/drm/radeon/atombios.c'/

Comment 7 Alex Deucher 2009-07-06 15:07:04 UTC

can you attach your video bios?
as root:
cd /sys/bus/pci/devices/0000\:01\:00.0/
echo 1 > rom
cat rom > /tmp/x700_vbios.rom
echo 0 > rom

Comment 8 Ken Lewis 2009-07-06 15:19:50 UTC

Created attachment 22236 [details]
video bios file

Comment 9 Alex Deucher 2009-07-06 15:45:17 UTC

Created attachment 22237 [details]
Fix quirk handling for MSI laptop

This patch should fix the connector enumeration.

Comment 10 Ken Lewis 2009-07-06 20:37:53 UTC

Created attachment 22241 [details]
Dmesg with working KMS output.

The patch Works For Me, against mainline commit 8e4a71.  Thanks so much for the quick turnaround.

WFM SignOff: Ken Lewis.