Modesetting failure with kernel 3.15; ok with kernel 3.14

Felix Miata mrmazda at
Fri Apr 18 00:09:22 UTC 2014

On 2014-04-17 15:49 (GMT-0500) Steven Usdansky composed:

> I can't get into X with my xorg.conf using the 3.15 kernel, so xrandr result is with 3.13 kernel.

If the nouveau driver is loaded and the proprietary nvidia driver is not, the following should be all the xorg.conf you need (Most of what yours contains is unnecessary):

# not for users of NVidia binary drivers

# This file's sections can be split into 4 individual files placed in /etc/X11/xorg.conf.d/.
# In some Xorg implementations, commented skeletons of such files already exist.
# If files in /etc/X11/xorg.conf.d/ are to be used, /etc/X11/xorg.conf should not exist.

# 50-device.conf
Section "Device"
	Identifier "Default Device"

# 50-monitor.conf
Section "Monitor"
	Identifier	"Default Monitor"
	HorizSync	30-86
	VertRefresh	56-76
	Option	"PreferredMode" "1680x1050"

# 50-screen.conf
Section "Screen"
	Identifier	"Default Screen"
	Device		"Default Device"
	Monitor		"Default Monitor"
#	DefaultDepth 16 # option that speeds older hardware

# 70-extensions.conf
#Section "Extensions"
#        Option          "Composite" "Disable" # disable bling to benefit less capable hardware

It works here with an old NV11 to specify whatever specific actually supported mode I choose by just changing the PreferredMode line. My display does not support 1680x01050, but both 1600x1200 and 1440x900 work here with 
32 bit 3.15.0-0.rc1 to override my 16:10 LCD's inexplicably preferred 1280x1024.
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

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Felix Miata  ***

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