Red Hat Bugzilla – Bug 53724
Sync out of range after Xconfigurator test on G450
Last modified: 2007-04-18 12:37:10 EDT
From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0) Description of problem: During setup, monitor (Viewsonic VG175) is detected as DDC with sane refresh parameters, suggests 1600x1200, but it's an LCD, so I override with 1280x1024x24. I get the Xconfigurator test screen, looks good, but when I hit OK I get a black screen. Substitution with another monitor indicates video is now coming at me at 127kHz H, 203Hz V, NN (!) Using the boot disk, I am able to set up the monitor OK with Xconfigurator with no problems. Version-Release number of selected component (if applicable): How reproducible: Didn't try Additional info: The same thing happened I think with Wolverine so I don't think it's Roswell-specific.
So are you seeing the behavior with the installer or Xconfigurator after installation? Or both?
It's the installer - After installation, Xconfigurator alone seems to work fine. [I assumed the installer was actually running Xconfigurator behind the scenes, because the test screen looked the same, but I realize now that's not necessarily the case]
Can you run ddcprobe and attach the results here?
Created attachment 32540 [details] Output of ddcprobe
BTW the installer showed the EISA ID (VSCdd00) rather than the model number, that may be intentional though. Here's the specs according to Viewsonic: http://www.viewsonic.com/products/lcd_vg175.cfm#specs
Hmm...part of the problem is that this monitor is not in the MonitorsDB file from Xconfigurator. The installer doesn't share code with Xconfiguration, but it does use the same video card and monitor databases. I think the problem would be fixed by adding your monitor to this database. I would recommend selecting the settings you want, but don't press the test button. Does that write out a correct XF86Config file? I know that's not a great workaround, but I think it will do for now. We'll have to fix this next release.
In the monitor screen, what does the installer put by default in the HSync and VSync boxes? Try putting "30-82" in the HSync box and "50-75" in the VSync box. Does that help? I've added a line for your monitor to the MonitorsDB, so this problem should not occur in future releases. Please reopen if you see this reappear in future betas. Thanks for your report.