Display won't run at native resolution (Solved - my mistake)

Message

jpr · #1 Post by **jpr** » Mon 07 Sep 2009, 13:55

EDIT: I was mistaken about my screen resolution. There was no problem to begin with. It is up to you if you want to read the rest of it.

Hi,
I have an old Gateway Solo 2500 laptop running Puppy-421 full installation.
Gateway site says that native resolution for the LCD panel is 1024 X 768 pixels.
But I believe what I am getting is 800x600. I know that my PupDial window gets clipped at the bottom - screen is too small. Some other apps get clipped and don't resize well. And if I right-click on a (maximized) leafpad window and select 'Resize', I get 561x418 in the middle of the screen. SeaMonkey window shows 790x545.
When running xorgwizard I tried selecting 1024x768x16 and 800x600x16 resolution and got exact same screen both times.
How can I set it to run at native 1024x768x16 resolution?

Thank you.

jpr · #2 Post by **jpr** » Mon 07 Sep 2009, 14:41

If I go to Menu > Setup > Xorg Video Wizard > Xorg Resolution Changer, the only options available are:
800x600@60.0* (checked)
640x480@60.0
320x240@60.0

I also went to Menu > Setup > Xorg Video Wizard > xvidtune. But did not run it because of warnings of possible permanent damage to my video card and/or display.
However I took a snapshot of the xvidtune window and am uploading it. It is showing some settings that I don't quite understand.

jpr · #3 Post by **jpr** » Mon 07 Sep 2009, 14:56

I didn't mean to dump this large image right into the post, but I can't figure out how to make it downloadable.

mikeb · #4 Post by **mikeb** » Mon 07 Sep 2009, 15:00

what does 'ddcprobe' in a terminal show ?

What card driver is listed near the bottom of /etc/X11/xorg.conf.

I'm guessing an onboard intel graphics card..I have read some need a workaround.....a search on here with the card details should reveal all...I've never had one so I'm not familiar.

mike

jpr · #5 Post by **jpr** » Mon 07 Sep 2009, 15:16

Hi Mike,
ddcprobe:

Code: Select all

# ddcprobe
vbe: VESA 2.0 detected.
oem: MagicGraph 128XD 48K SVGA BIOS
memory: 1984kb
mode: 640x400x256
mode: 640x480x256
mode: 800x600x16
mode: 800x600x256
mode: 1024x768x16
mode: 1024x768x256
mode: 320x200x32k
mode: 320x200x64k
mode: 640x480x32k
mode: 640x480x64k
mode: 640x480x16m
mode: 800x600x32k
mode: 800x600x64k
mode: 800x600x16m
mode: 1024x768x32k
mode: 1024x768x64k
mode: 1600x1200x256
mode: 1600x1200x32k
mode: 1600x1200x64k
edid: 
edidfail

Bottom half of xorg.conf:

Code: Select all

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
	HorizSync    31.5-48.5
	VertRefresh  40-70
	#UseModes     "Modes0" #monitor0usemodes
	Option      "PreferredMode" "1024x768"
	EndSection
	
Section "Modes"
	Identifier "Modes0"
	#modes0modeline0
EndSection

Section "Device"
	Identifier  "Card0"
	Driver      "neomagic" #card0driver
	VendorName  "Neomagic Corporation"
	BoardName   "NM2160 [MagicGraph 128XD]"
	BusID       "PCI:0:2:0"
EndSection

Section "Screen"
   Identifier "Screen0"
   Device     "Card0"
   Monitor    "Monitor0"
   DefaultDepth 16
   Subsection "Display"
      Depth       16
      Modes       "1024x768"
   EndSubsection
EndSection

#PuppyHardwareProfile=MagicGraph_128XD_48K

mikeb · #6 Post by **mikeb** » Mon 07 Sep 2009, 19:58

Code: Select all

mode: 1024x768x64k

well should run 16 bit at that resolution and thats what xorg.conf is set to with a suitable driver.

Does xvesa allow this resolution.?

Have a look in /var/log/Xorg.0.log ... see if there are any relevant error messages...there could be problem with the driver or its not seeing the full video ram

mike

jpr · #7 Post by **jpr** » Mon 07 Sep 2009, 21:19

I tried running Xvesa but it made a big mess of my screen where I could hardly see what was on it. I ended up doing a hard shutdown.

I added these lines to xorg.conf, section "Device":

Code: Select all

Option "XaaNoScanlineImageWriteRect"
Option "XaaNoScanlineCPUToScreenColorExpandFill"

It didn't help.

I found a lot of conflicting statements in my Xorg.0.log file, like:

Code: Select all

(II) NEOMAGIC(0): Removing mode (512x384) larger than the LCD panel (800x600)
(II) NEOMAGIC(0): Not using default mode "512x384" (unknown reason)

Surely 512x384 is not larger than 800x600.

This line attracted my attention:

Code: Select all

(--) NEOMAGIC(0): Panel is a 800x600 color TFT display

Where did it come from? I thought this was supposed to be a 1024x768 display.

Patriot · #8 Post by **Patriot** » Mon 07 Sep 2009, 21:33

Hmmm .....

Just a quick browse through ...

jpr wrote: .....
This line attracted my attention, line 272:
Code: Select all
(--) NEOMAGIC(0): Panel is a 800x600 color TFT display
Where did it come from? I thought this was supposed to be a 1024x768 display.

According to the specs, there are two LCD sizes: 13.3" (1024x768) and 12.1" (800x600) for your model, which I believe was the standard LCD size vs resolution back then ...

Kindly verify the LCD size on your model ...

Rgds

mikeb · #9 Post by **mikeb** » Mon 07 Sep 2009, 21:36

Hmmm looks like driver oddness or wrestle with the config

http://www.linuxquestions.org/questions ... f71483a507
http://www.murga-linux.com/puppy/viewtopic.php?t=14140

this is a variation of the i810 chipset so perhaps fixes for that may help
http://www.murga-linux.com/puppy/viewtopic.php?t=753

there is some neomagic stuff here...possible fix...
http://www.puppylinux.com/news/news400a1-400a3.htm
long post so search....from there

# cherriepuppy Says:
December 15th, 2007 at 2:58 am

Well done barry and the puppy team, burned to cd on main pc (athlon 3000, ati9250 graphics,1GB ram), booted up puppy (pfix=ram), extracted the neomagic driver from the full Xorg 7.3 binary package and saved in /usr/X11R7/lib/xorg/modules/drivers. shut down pc saving session to cd.
now the good bit….put cd in toshiba portege 7010 laptop and booted up using wake2pup, Xorg wizard asked to confirm lcd resolution, tested ok,ctrl+alt+backspace, done, puppy running fine. First time without having to mess around altering xwin and manually configuring Xorg.conf. this will be great for all puppy users with older toshiba laptops

mike

edit..or perhaps this is thee problem..

According to the specs, there are two LCD sizes: 13.3" (1024x768) and 12.1" (800x600) for your model, which I believe was the standard LCD size vs resolution back then ...

jpr · #10 Post by **jpr** » Mon 07 Sep 2009, 22:18

Oops, I should have read the specs better.
Mine is a 12.1 inch, unfortunately. So it has to be 800x600.
My mistake.
What throwed me off is I came across this laptop on the web a couple of times and they both quoted 1024x768 resolution. So I took it for granted that it was the only screen they used.
I wonder if they used the same laptop case with 13.3 inch model. Maybe a slim bezel?

Thank you for your help. I know more about video out of this.

jpr · #11 Post by **jpr** » Mon 07 Sep 2009, 23:31

Here is something interesting:
I found this command on the web: 'xdpyinfo'
So I ran it:

Code: Select all

# xdpyinfo  | grep 'dimensions:'
  dimensions:    800x600 pixels (271x203 millimeters)

So I have a couple of questions:
(1) Is 800x600 the native resolution of LCD (physical pixels) or is it the resolution that OS is using?
(2) Calculate diagonal for (271x203 millimeters):
(sqrt(271^2+203^2))/25.4 = 13.33 inches!
That looks like it would have to be the 13.3 inch model with 1024x768 resolution.
But if I measure the visible area of the screen with a ruler, I get about 12.1 inches.

Maybe someone can untangle this.

(old)Puppy Linux Discussion Forum

(old)Puppy Linux Discussion Forum

Display won't run at native resolution (Solved - my mistake)

Display won't run at native resolution (Solved - my mistake)