Hi all,

This 22" external LCD was working with Fedora 7. It is still working with WinXP on the same laptop. However, after upgrading from Fedora 7 to Fedora 8, it has never worked in the graphic mode. It works only in text mode. When entering the graphic mode (basically, when starting X) the external monitor displays NO SIGNAL and blanks out. The laptop LCD works well. Need help to make the external monitor work again.

Here's the data:

xrandr -q

Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1200
VGA-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 60.0*+
1280x1024 75.0 59.9
1440x900 75.0 59.9 59.9
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*+ 60.0
800x600 60.3 59.9
640x480 59.9 59.4
S-video disconnected (normal left inverted right x axis y axis)

/sbin/lspci

00:00.0 Host bridge: ATI Technologies Inc AGP Bridge [IGP 320M] (rev 13)
00:01.0 PCI bridge: ATI Technologies Inc PCI Bridge [IGP 320M] (rev 01)
00:02.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:06.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link Controller Audio Device (rev 02)
00:07.0 ISA bridge: ALi Corporation M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+]
00:08.0 Modem: ALi Corporation M5457 AC'97 Modem Controller
00:09.0 Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 02)
00:0a.0 CardBus bridge: O2 Micro, Inc. OZ601/6912/711E0 CardBus/SmartCardBus Controller
00:0c.0 FireWire (IEEE 1394): Texas Instruments TSB43AB21 IEEE-1394a-2000 Controller (PHY/Link)
00:10.0 IDE interface: ALi Corporation M5229 IDE (rev c4)
00:11.0 Bridge: ALi Corporation M7101 Power Management Controller [PMU]
00:12.0 Ethernet controller: National Semiconductor Corporation DP83815 (MacPhyter) Ethernet Controller
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility U1

more /etc/X11/xorg.conf

Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

#Section "Monitor"
# Identifier "Laptop"
# DisplaySize 305 230
# HorizSync 29-49
# VertRefresh 24-66
#EndSection

Section "Monitor"
Identifier "ProView"
DisplaySize 474 296
HorizSync 30-81
VertRefresh 55-77
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
# Option "Monitor-LVDS" "Laptop"
# Option "Monitor-VGA-0" "ProView"
# Option "MonitorLayout" "CRT,LVDS"
BusID "PCI:1:5:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "ProView"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1680x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1680x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1680x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1680x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 1
Modes "1680x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

more /var/log/Xorg.0.log

(see next post)

I don't care for 3D acceleration. Just want to get the darn thing working again in the basic mirror/clone mode.

see here:
http://forums.fedoraforum.org/attach...chmentid=13921

A suggestion,
perhaps you have various things plugged in, plug 'em all out and try again. If that fails maybe it's a conflict between your graphics card and your new monitor or else the monitor is not supported by linux, just a guess.

Roy.

Thanks Roy. There is not much left to unplug. As I said, this monitor used to work fine with Fedora 7 on exactly the same hardware. In Fedora 8, it works only in text mode. I suspect the radeon graphic driver or something else in Xorg is not doing its job.

I am also experiencing this kind of thing -- it worked perfectly in fc6, but now in fc8 the external monitor will give this "cannot display this mode". I'm using a Thinkpad R40 with a radeon mobility 7500 with a 1024x768 internal LCD and a 1600x1200 Dell FP2001 external monitor (connected with the analog cable). I even copied the fc6 xorg.conf file over and it still does this.

However, when I also have the laptop's lid open it will display the whole 1600x1200 background on the external LCD, while it chops off the application windows to fit the 1024x768 resolution of the laptop. There is obviously some bug that needs to be filed, but I don't know where to go for this.

Does anyone know where to get the latest radeon mobility 7500 drivers? ATI only had the mobility 9xxx drivers on their website. Did fedora 8 use the latest drivers? Perhaps I should use the driver from fc7? Perhaps I should switch back to fc7 or use Ubuntu?

Updated from debian etch to debian lenny and have the same problem now.

I hava a Fujitsu-Siemens Amilo A with ATI Technologies Inc Radeon Mobility U1

xrandr -q:
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm

But the internal display (LVDS) has a resolution of 1280 - seams that x swaps the displays