Created attachment 22093 [details]
Output of "xrandr --verbose" after "xrandr --output VGA --auto"

Created attachment 22094 [details]
Xorg server logs

See also bug #12416 (Problems with displaying to a projector).

(In reply to comment #2)
> Created an attachment (id=22094) [details]
> Xorg server logs
> 

pls turns modedebug on and resumbit the log. refer to http://intellinuxgraphics.org/how_to_report_bug.html. thanks.

ping...

Created attachment 22247 [details]
Serveur log: i used "xrandr --output VGA --auto" twice, modedebug on

Created attachment 22248 [details]
"xrandr --verbose" after using "xrandr --output VGA" twice

Note: The output worked well on an older Linux version (Ubuntu Hardy, maybe Ubuntu Gutsy, I don't remember). So it's a regression of the driver.

hi Victor Stinner,
It may be from TV detection. 
Could you try to append Option "Ignore" "true" in TV
monitor section of xorg.conf. After xorg start, please use intel_reg_dumper tool to dump register. 



Thanks
Ma Ling

Created attachment 22463 [details]
Xorg server configuration

Oh, I forgot to attach my server configuration -> done. As you can see, my configuration is quite empty.

@MaLing: I don't have any television (only an external LCD monitor). Should I create a new section for a TV and then add the ignore flag? What is the syntax of such section?

About intel_reg_dumper: >Option "ModeDebug" "yes"< is not enough?

Created attachment 22464 [details]
Register dumps when Gnome just started

Created attachment 22465 [details]
Register dumps after xrandr --output VGA --auto

Created attachment 22467 [details]
New tested configuration to disable TV ouptut

Here is a new configuration for the Xorg server. I tried it to disable the TV output but I don't know if it really disabled the TV output. But it doesn't fix my problem (enable VGA output).

I tried the GIT version of the xf86-video-intel driver. I tried to force "Ignore TV" quirk, but also "Ignore TV" + "Force PIPE A" and finally just "Force Pipe A". Result: no reaction from the CRT screen.

Victor, is this a regression? i.e. did the same HW ever worked before?

Also, pls try to disable LVDS ( the same way as you disable TV ) to see if you can get display on VGA monitor...And, attach the log with modedebug on then, thanks.

> Victor, is this a regression? i.e. did the same HW ever worked before?

Yes, I worked in older Linux version. Sorry, I don't remember which one. Since the CD reader is broken, it's hard to test an old live CD to check the exact Xorg/driver driver version :-/

It worked in another Ubuntu version (maybe Hardy... maybe Gutsy...). I tried to compile an old version of the Intel driver, but it doesn't compile because Xorg API changed...

> Also, pls try to disable LVDS

I will try to disable LVDS.

what if you connect your VGA monitor all the time during system power on? Can you see BIOS message on it? Will it makes any difference ?

And, please, attach a log with modedebug turns on..

there isn't a xorg.log with modedebug turns on .. ping for response...

Michael Fu> Also, pls try to disable LVDS ( the same way as you disable TV )

No change, VGA stays black (but the LVDS becomes slowly white).

Michael Fu> And, attach the log with modedebug on then
(...)
Michael Fu> And, please, attach a log with modedebug turns on..

I already asked (comment #11) how should I enable this option? 

I added >Option "ModeDebug" "yes"< to my device section (in xorg.conf). Is it enough? If no, can you fix my configuration? Sorry, but the "How to file a good bug report" guide doesn't help any ModeDebug (eg. "X --configure" doesn't work here: Unrecognized option: --configure).

Michael Fu> what if you connect your VGA monitor all the time during system
Michael Fu> power on? Can you see BIOS message on it? Will it makes 
Michael Fu> any difference ?

I tried to turn off my laptop, and restart with the VGA monitor connected. No, I don't see the BIOS message on the second screen. Should I see the BIOS on the VGA?

How can I know if ModeDebug is enabled? (eg. give me a typical pattern in the logs)

Created attachment 22998 [details]
Xorg server with Ubuntu Ibex driver (intel 2.4) and mode debug enabled (I hope)

I recreated new configuration: I deleted my config and copy/pasted the "builtin" config in Xorg.0.log, then I added >option "ModeDebug" "yes"< in the device section using the "intel" driver.

Created attachment 22999 [details]
Xorg configuration associated to my last attachment (#22998)

Note: I tried with a 19" LCD (Belina), but I also tried with a second LCD screen (Dell 19") with a second VGA cable. In both cases, the Ubuntu tool to configure the screen detects correctly the screen name (Belina / Dell).

I used these commands to enable the VGA output:
  xrandr --output LVDS --mode 1024x768 --output VGA --clone
  xrandr --output LVDS --mode 1280x1024 --output VGA --clone
  xrandr --output VGA --auto --output LVDS --off

My LVDS native resolution is 1400x1050. Both external LCD native resolution is 1280x1024.

Sometimes, after a xrandr command or at Xorg startup, the external LCD screen (especially the Dell) blinks 0,5 second like "oh, something happens" but it stays black.

(In reply to comment #20)
> Michael Fu> Also, pls try to disable LVDS ( the same way as you disable TV )
> 
> No change, VGA stays black (but the LVDS becomes slowly white).
> 
> Michael Fu> And, attach the log with modedebug on then
> (...)
> Michael Fu> And, please, attach a log with modedebug turns on..
> 
> I already asked (comment #11) how should I enable this option? 
> 
> I added >Option "ModeDebug" "yes"< to my device section (in xorg.conf). Is it
> enough? If no, can you fix my configuration? Sorry, but the "How to file a good
> bug report" guide doesn't help any ModeDebug (eg. "X --configure" doesn't work
> here: Unrecognized option: --configure).

you are doing good. yes. just add the option to device section would be enough.

could you try to add option "ForceEnablePipeA" the device section as well to see any difference? and attach the log, please?

> 
> Michael Fu> what if you connect your VGA monitor all the time during system
> Michael Fu> power on? Can you see BIOS message on it? Will it makes 
> Michael Fu> any difference ?
> 
> I tried to turn off my laptop, and restart with the VGA monitor connected. No,
> I don't see the BIOS message on the second screen. Should I see the BIOS on the
> VGA?
> 

> could you try to add option "ForceEnablePipeA" the device section as well to
> see any difference? and attach the log, please?
> 
to be specific, Need to add

 Option "ForceEnablePipeA" "True"

Just double check if you were using the option correctly before... thanks.

ping for response... victor

I already tried >Option "ForceEnablePipeA" "True"< but also forcing it in the driver source code. It doesn't change anything.

do you have any setting in bios that can be changed related with display device?

> do you have any setting in bios that can be changed related 
> with display device?

No, there is nothing related to the video/display in the BIOS. Why would my problem related to BIOS? Remember: it worked with old version of Ubuntu (of Xorg/intel driver) without touching anything in the BIOS.

I asked our Dell friend to have a test on another D520. He used a Ubuntu 8 .10 LiveCD and could get display on VGA using "xrandr -output VGA --auto", with no problem... he will provide me the log later.

is there any chance you could try another OS or another linux distribution to see if the VGA can work?

Created attachment 23664 [details]
please try it on your machine,thanks

 Victor, could please you try this debug patch, then upload log file with Modedebug option on ?

Thanks
Ma Ling

ping Victor ~
thanks
Ma Ling

> could please you try this debug patch

I'm busy, I will try next week, sorry.

(In reply to comment #34)
> > could please you try this debug patch
> 
> I'm busy, I will try next week, sorry.
> 

if any chance, please also try if other distro or windows work as I suggested in comment# 31.

ping.

lost connect with bug reporter, I close the issue, please open it when you need.

Thanks 
Ma Ling