[ltp] 15" DisplaySize (DPI value)

[noc ops]

Peter Frühberger wrote:
> noc ops schrieb:
> 
>>>Based on the below formula my DPI value doesn't appear to be making
>>>sense. Not sure I'm missing something.
>>>
>>>I would appreciate if someone could validate this value.
>>>
>>>
>>>I have a laptop (15") w/ 1024x768 (max) resolution. My xdpyinfo output
>>>displays 85x85 dpi?
>>>
>>>formula:
>>>diagonal mm = diagonal inches * 25.4
>>>horizontal mm = 4* diagonal mm / 5
>>>vertical mm = 3 * diagonal mm /5
>>>
>>>381mm = 15 * 25.4
>>>305mm = 4* 381mm /5
>>>229mm = 3* 381mm /5
>>>
>>>DisplaySize = 305  229
>>>
>>>
>>>Here's a cut&paste of my xorg.conf
>>>=================================
>>>
>>>Section "Files"
>>>        FontPath        "/usr/share/X11/fonts/misc"
>>>        FontPath        "/usr/share/X11/fonts/cyrillic"
>>>        FontPath        "/usr/share/X11/fonts/100dpi/:unscaled"
>>>        FontPath        "/usr/share/X11/fonts/75dpi/:unscaled"
>>>        FontPath        "/usr/share/X11/fonts/Type1"
>>>        FontPath        "/usr/share/X11/fonts/CID"
>>>        FontPath        "/usr/share/X11/fonts/100dpi"
>>>        FontPath        "/usr/share/X11/fonts/75dpi"
>>>        # paths to defoma fonts
>>>        FontPath        "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
>>>        FontPath        "/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"
>>>EndSection
>>>
>>>Section "Module"
>>>        Load    "GLcore"
>>>        Load    "i2c"
>>>        Load    "bitmap"
>>>        Load    "ddc"
>>>        Load    "dri"
>>>        Load    "extmod"
>>>        Load    "freetype"
>>>        Load    "glx"
>>>        Load    "int10"
>>>        Load    "type1"
>>>        Load    "vbe"
>>>EndSection
>>>
>>>{snip}
>>> ......
>>>
>>>Section "Device"
>>>        Identifier      "ATI Technologies, Inc. Radeon 330M/340M/350M
>>>(RS200 IGP)"
>>>        Driver          "ati"
>>>        BusID           "PCI:1:5:0"
>>>EndSection
>>>
>>>Section "Monitor"
>>>        Identifier      "Generic Monitor"
>>>        Option          "DPMS"
>>>        DisplaySize     305     229
>>>EndSection
>>>
>>>Section "Screen"
>>>        Identifier      "Default Screen"
>>>        Device          "ATI Technologies, Inc. Radeon 330M/340M/350M
>>>(RS200 IGP)"
>>>        Monitor         "Generic Monitor"
>>>        DefaultDepth    24
>>>        SubSection "Display"
>>>                Depth           1
>>>                Modes           "1024x768"
>>>        EndSubSection
>>>        SubSection "Display"
>>>                Depth           4
>>>                Modes           "1024x768"
>>>        EndSubSection
>>>        SubSection "Display"
>>>                Depth           8
>>>                Modes           "1024x768"
>>>        EndSubSection
>>>        SubSection "Display"
>>>                Depth           15
>>>                Modes           "1024x768"
>>>        EndSubSection
>>>        SubSection "Display"
>>>                Depth           16
>>>                Modes           "1024x768"
>>>        EndSubSection
>>>        SubSection "Display"
>>>                Depth           24
>>>                Modes           "1024x768"
>>>        EndSubSection
>>>EndSection
>>>
>>>Section "ServerLayout"
>>>        Identifier      "Default Layout"
>>>        Screen          "Default Screen"
>>>        InputDevice     "Generic Keyboard"
>>>        InputDevice     "Configured Mouse"
>>>        InputDevice     "Synaptics Touchpad"
>>>EndSection
>>>
>>>Section "DRI"
>>>        Mode    0666
>>>EndSection
>>>
>>>
>>>Any insight will be appreciated.
>>>
>>>
>>>
>>>regards,
>>>/virendra
>>>
> 
> 
> seems to be correct, I use the same values!
> fritsch@todesstern:~$ less /var/log/Xorg.0.log |grep DPI
> (**) RADEON(0): DPI set to (85, 85)
> 
> fritsch@todesstern:~$ cat /etc/X11/xorg.conf  |grep DisplaySize
>         DisplaySize     305 229
------------
Thanks. I also ran through another calc to confirm the same.

1204*25.4/85 = 305
768*25.4/85 = 229


> 
> I stil cannot belive that you shipped back your 1400x1050 Display :-(
------------
I just found out that IBM will be shipping me a replacement :-)

So yes now I will have a chance to test/confirm 1400x1050 output what
others have claimed.



regards,
/virendra

> 
> Regards,
> 
> Peter
> 
> 
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