[West Lake] System detected display size does not match the actual physcial display dimension

[David Chen]

OS Version:
Intrepid, Jaunty

Environment:
Intel G41 graphic controller

Summary:
System can't detect correct display size. For example, a 19" display is detected as 17".

Steps to Reproduce:
Boot the system (19" system), open display property (System --> Preferences --> Display).

Expected result:
Display preferences detect 19" monitor.

Actual result:
Display preferences detect is as 17" monitor.

[Jerone Young (jerone)]

David can you post xrandr output? What resolution do you expect?

[David Chen (david.chen)]

The resolution is correct (1440x900), the problem is the display dimension does not match the actually display. The system I have is a 19", but system detects it as a 17".

[David Chen (david.chen)]

I think the issue is related to EDID. EDIDs might not be written correctly into the device.

[David Chen (david.chen)]

Monitor firmware update solved the problem. 17" and 19" monitors can be detected as 17" and 19" from the OS, and 18.5" is detected as 18".