#6992 NORM Never A: DPI and screen size are in conflict

Zarro Boogs per Child bugtracker at laptop.org
Sun May 11 23:39:39 EDT 2008


#6992: DPI and screen size are in conflict
-----------------------------+----------------------------------------------
 Reporter:  AlbertCahalan    |       Owner:  bernie        
     Type:  defect           |      Status:  new           
 Priority:  normal           |   Milestone:  Never Assigned
Component:  x window system  |     Version:  Update.1      
 Keywords:                   |    Verified:  0             
 Blocking:                   |   Blockedby:                
-----------------------------+----------------------------------------------
 xdypinfo reports a 201 DPI display of size 152x114 mm.
 Besides being in conflict with the widely reported DPI
 of 200, this is in conflict with itself:

 {{{
 1200/(152/25.4)=200.526315806
 200*(152/25.4)=1196.8503936
 (1200/200)*25.4=152.4
 }}}

 The numbers work out fine for a 152.4x114.3 mm display at 200 DPI.
 This would also fit better with my physical measurement of the B4
 prototype hardware, which is a tad larger than 152x114 mm.

 Some X video drivers allow DPI to be directly specified. If the
 Geode driver has this ability, it should be used. (if not, it
 should be implemented)

 It may also be possible to specify 152.4x114.3 mm as the screen
 size. If so, that should be done. (if not, X needs fixing)

-- 
Ticket URL: <http://dev.laptop.org/ticket/6992>
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