Bug 162466
| Summary: | Missing LG 1710B entry in monitor data base leads to flawed X setup | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Joachim Frieben <jfrieben> |
| Component: | system-config-display | Assignee: | Adam Jackson <ajax> |
| Status: | CLOSED RAWHIDE | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | Keywords: | FutureFeature |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | 0.160-1 | Doc Type: | Enhancement |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-09-01 08:10:44 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Attachments: | |||
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Description
Joachim Frieben
2005-07-05 09:08:00 UTC
Created attachment 116346 [details]
X configuration file produced by "system-config-display"
Do you have an INF file for this monitor? Created attachment 116399 [details]
L1710B inf file provided by the manufacturer LG
Added, will be in 0.160-1 Under Windows XP Professional, the (external) L1710B monitor is automatically detected and configured as a plug and play monitor with a refresh rate of 60 Hz. I have no idea why LG chose 75 Hz in their device file. In this respect, the inf file content should of course not be adopted identically. Changed to max out at 70, that should allow something sane to happen. After a clean install from the Rawhide development tree, the default
refresh rate is still set to 75 Hz, as well for the graphical installer
as for the final X setup. On can use "Screen Resolution Preferences"
later on to switch to the lower of the two suggested values which is
60 Hz. The relevant package is "hwdata-0.169-1". The entries for the
L1710B display show the correct modified values:
>
> LG Electronics Inc.; LG L1710B(Digital); GSM4358; 30.0-71.0; 56.0-70.0
> LG Electronics Inc.; LG L1710B(Analog); GSM4356; 30.0-83.0; 56.0-70.0
>
but they don't get used. At 75 Hz the image is blurred, at 60 Hz the
image is crisp.
What is even more weird is that when I set the driver to "vesa", the only
suggested refresh rate by "Screen Resolution Preferences" is 76 Hz, but
nevertheless, the image is ok now!
Created attachment 119659 [details]
Ananconda generated test X configuration file
Created attachment 119660 [details]
Anaconda generated test X configuration file
can you attach the X startup log? i wonder if we're just not getting anything useful out of DDC. Created attachment 126069 [details]
X.0.log for LG1710B attached to IBM ThinkPad T23 (no DDC)
I also tried with all relevant monitor entries being outcommented. The
relevant section of "X.0.log" now reads:
(II) SAVAGE(0): Monitor0: Using default hsync range of 30.00-83.00 kHz
(II) SAVAGE(0): Monitor0: Using default vrefresh range of 56.00-75.00 Hz
^^^^^^^
The only difference is the keyword "default" which indicates that the
frequency ranges have been returned by DDC. They are exactly identical to
the values gathered by "pyxf86config" (certainly also via DDC and not by
querying the hardware data base) during the system install.
Looks like it's not properly setting the monitor sync range based on EDID info. This should be fixed as of about xorg-x11-server-1.1.0-17 in rawhide; can you test? The issue was fully settled in "rawhide" a couple of days ago. Thanks for the great work! |