Bug 8538 - nv driver gives bad screen sync rates
Summary: nv driver gives bad screen sync rates
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nVidia (open) (show other bugs)
Version: 7.1 (2006.05)
Hardware: x86 (IA32) Linux (All)
: high major
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
Depends on:
Reported: 2006-10-06 18:48 UTC by Larry Garfield
Modified: 2011-09-14 13:00 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:


Description Larry Garfield 2006-10-06 18:48:31 UTC
I am running Debian Sid, and recently ran a routine update.  A slightly new 
version of xorg was installed, 7.1.0-2.  After a reboot, X would no longer 
start.  I had been using the nvidia proprietary driver (card is XFX nVidia 
6600GT), and it would simply fail.  I switched to the nv driver, and ran 
startx.  My monitor (15" LCD, KDS Rad-5p) went various streaked colors, and 
reported "out of sync range.  v:78.9/h:35.4".  Switching back to a text vterm, 
it was still streaked out and required a reboot to clear it.  

I experimented with my xorg.conf settings a bit, and found no difference if I 
explicitly specified 

HorizSync       31-62
VertRefresh     56-75

or left those blank.  I still got the same error from the monitor.  (Those are 
the values reported by the monitor, according to the log file.)  I also 
commented out all of the SubSections in the "Screen" section, and again no 

However, if I switched to the vesa driver, X started normally, albeit in 2D and 
with a refresh that is quite slow and barely usable.  

I'm not sure what other info you'd need.  I wasn't sure if I should file this 
here or on the Debian BTS, but was advised to do so here by someone in #xorg on 
freenode.  Let me know if there is other info I could provide.
Comment 1 Whit Blauvelt 2006-11-20 09:27:26 UTC
I may be having the same problem. Just upgraded Xorg under Gentoo to the modular
version (7.1.1). Running X -configure produces a configuration file that has the
proper sync rates, but trying to run with it gives only an "Out of range" error
from my monitor - despite its having been correctly recognized by X -configure.
Further, nearly identical values were previously working under Xorg - and the
monolithic XFree before it. But now they don't!

So far, I don't know if the sync is out of range, or maybe X is trying to go to
a resolution this monitor doesn't support. 
Comment 2 Daniel Stone 2007-02-27 01:33:55 UTC
Sorry about the phenomenal bug spam, guys.  Adding xorg-team@ to the QA contact so bugs don't get lost in future.
Comment 3 Milan Kerslager 2007-09-07 11:09:30 UTC
Nv driver is still unable to autodetect via DDC or EDID even I'm using latest Fedora 8 Test 2 with xorg-x11-drv-nv-2.1.3-1.fc8. This does not work for more than a year.

This leads to unusable 'nv' driver on many motherboards with onboard graphics.
Comment 4 Milan Kerslager 2007-09-07 11:17:18 UTC
See bug #12002 for possible reason.
Comment 5 Corbin Simpson 2011-09-14 13:00:29 UTC
xf86-video-nv has been officially unmaintained for a bit now, and we are closing all -nv bugs. If your problem was not addressed, and -nv is still broken, please try xf86-video-nouveau. Thank you.

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