Bug 22948 - ddc probed monitor: just a bunch of weird characters
Summary: ddc probed monitor: just a bunch of weird characters
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: anaconda
Version: 7.1
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Brent Fox
QA Contact: Brock Organ
Depends On:
TreeView+ depends on / blocked
Reported: 2000-12-28 16:40 UTC by giulioo
Modified: 2007-04-18 16:30 UTC (History)
0 users

Clone Of:
Last Closed: 2001-02-08 20:50:42 UTC

Attachments (Terms of Use)

Description giulioo 2000-12-28 16:40:39 UTC
AcerView54eL. Generally I configure it as AcerView54es or AcerView54e.
VideoCard: TridentBlade3D (Generic)

I tried 2 installs.

On the 1st try anaconda said
DDC probed monitor: GSldf37

On the 2nd
DDC probed monitor: MVCb75d

The frequencies were clearly wrong.

If the DDC probed monitor is just a string of weird chars (I agree it's 
very difficult to say what is a string of "weird chars") it would be 
better to let the user pick the right (or more suitable) monitor type from 
the list instead of presenting a screen with a weird kind of monitor 
selected. A new user would be confused "I have a monitor very similar to 
that one on the list, but the installer says I have "MVCb75d". Lets' call 
tech support" :)

Comment 1 Michael Fulbright 2001-01-09 23:02:19 UTC
We have observed this occurs with some monitors.  Is the monitor attached thru a

Comment 2 giulioo 2001-01-10 15:26:38 UTC
No, the monitor is attached directly to the videocard.
Sometime ago i was given this code snippet to debug some other problems I had:

== ddcprobe
import kudzu
print devices

[root@i5 go]# date && ./ddcprobe
mer gen 10 16:30:12 CET 2001
[Desc:           None
Id:             CU]9f15
Mem on card:    8192
HSync:          0-0
VSync:          0-0
[root@i5 go]# date && ./ddcprobe
mer gen 10 16:30:14 CET 2001
[Desc:           None
Id:             O^]bf5f
Mem on card:    8192
HSync:          0-0
VSync:          0-0
[root@i5 go]# date && ./ddcprobe
mer gen 10 16:30:15 CET 2001
[Desc:           None
Id:             URK97b5
Mem on card:    8192
HSync:          0-0
VSync:          0-0
[root@i5 go]#

Comment 3 Michael Fulbright 2001-01-17 20:33:58 UTC
DDC probing can be unreliable with some card/monitor combinations.  Can you see
what another OS (windows?) detects the monitor as?

Comment 4 giulioo 2001-01-23 20:26:42 UTC
winme cannot detect the kind of monitor either. It installs it as "predefined 

I think you could do 3 ddcprobe in a row, and if the results are not the same 
let the user pick the monitor without preselecting anything.

Comment 5 Michael Fulbright 2001-02-08 20:50:37 UTC
Interesting proposal, I will forward it to a developer.

Comment 6 Brent Fox 2001-02-08 21:03:40 UTC
I think this is probably a pretty rare occurance, and I'm reluctant to add code
for it.  I think most users would see that the monitor was not correctly
identified and would select the right one.  I just don't think doing the
ddcprobe more than once is the right thing to do.

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