[LAU] rt prio with kernel 3.x, issue to use the vesa driver

Ralf Mardorf ralf.mardorf at alice-dsl.net
Sun May 6 11:43:32 UTC 2012

That for a shared IRQ the graphics will become an unwanted high prio
doesn't happen with a kernel 2.6.31-rt19 + NVIDIA 195.36.15 on Suse 11.2
on my machine.
As already reported, it also doesn't happen with the kernels
3.0.23-avl-7-pae (threadirqs) and 3.0.23-rt40 on current AV Linux, where
still the nv driver is available and used on my machine.
IIUC it's definitive related to the kernel, I anyway will test the vesa
driver with Ubuntu Studio Precise, but can' get it working.
I modified the xorg.conf I use with the nvida driver, startup ends with
tty, no X. Does anybody notice what I might have missed?

Latest modification:

Section "ServerLayout"
	Identifier     "X.org Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"

Section "Module"
	#Load  "glx"
	#Load  "dbe"
	#Load  "dri2"
	#Load  "extmod"
	#Load  "record"

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"de"
	Option		"XkbVariant"	"ro"
	Option		"XkbOptions"	"lv3:ralt_switch"

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5 6 7"

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
  	DisplaySize  305 230
  	HorizSync    29-98
  	VertRefresh  50-120
	#modeline     "1152x864" 128.42 1152 1232 1360 1568 864 865 868 910
  	#Gamma	     1.0

Section "Device"
	Identifier  "Card0"
	Driver	"vesa"
	#Option      "Coolbits"	"1"
	#Option      "AddARGBGLXVisuals"	"true"
	#Option      "TripleBuffer"	"false"
	#VendorName  "nVidia Corporation"
	#BoardName   "G72 [GeForce 7300 SE/7200 GS]"
	BusID       "PCI:1:0:0"

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	SubSection "Display"
		#Viewport   0 0
		#Depth	24
		#Modes      "1152x864"
                #Virtual    3840 1200

#Section "Extensions"
#	Option      "Composite"	"enable"


PS: If there won't be an rtirq script able to handle it or any other way
to do it, I hadn't time to test until now, I'll simply will use a kernel
<= 3.0 instead > 3.0.

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