How to change Dispkay Freq from 60Hz to 70Hz ?

English Hardware
#1

Laptop “Compaq NX7300”
fresh install opensuse13.1… use XFCE
In the “Settings Manager” | “Display” i see only 60,1Hz.

How i can change to the 70Hz ?

Serg

 xrandr --verboseScreen 0: minimum 320 x 200, current 1280 x 800, maximum 32767 x 32767
LVDS1 connected 1280x800+0+0 (0x47) normal (normal left inverted right x axis y axis) 330mm x 210mm
    Identifier: 0x42
    Timestamp:  258522
    Subpixel:   horizontal rgb
    Gamma:      1.0:1.0:1.0
    Brightness: 1.0
    Clones:    
    CRTC:       1
    CRTCs:      1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    EDID: 
        00ffffffffffff00320c002a00000000
        000f0102802115780a0f109758528828
        23505400000001010101010101010101
        010101010101d51b00a0502017303020
        26002115100000190000000000000000
        00000000000000000000000000fe004c
        475068696c6970734c43440a000000fe
        004c503135345730312d544c414500cb
    BACKLIGHT: 10 
        range: (0, 10)
    Backlight: 10 
        range: (0, 10)
    scaling mode: Full aspect 
        supported: None, Full, Center, Full aspect
  1280x800 (0x47)   71.2MHz -HSync -VSync *current +preferred
        h: width  1280 start 1328 end 1360 total 1440 skew    0 clock   49.5KHz
        v: height  800 start  802 end  808 total  823           clock   60.1Hz
  1024x768 (0x91)   65.0MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock   48.4KHz
        v: height  768 start  771 end  777 total  806           clock   60.0Hz
  800x600 (0x92)   40.0MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock   37.9KHz
        v: height  600 start  601 end  605 total  628           clock   60.3Hz
  800x600 (0x93)   36.0MHz +HSync +VSync
        h: width   800 start  824 end  896 total 1024 skew    0 clock   35.2KHz
        v: height  600 start  601 end  603 total  625           clock   56.2Hz
  640x480 (0x94)   25.2MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz
        v: height  480 start  490 end  492 total  525           clock   59.9Hz
VGA1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x43
    Timestamp:  258522
    Subpixel:   unknown
    Clones:    
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
TV1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x44
    Timestamp:  258522
    Subpixel:   unknown
    Clones:    
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    bottom margin: 37 
        range: (0, 100)
    right margin: 46 
        range: (0, 100)
    top margin: 36 
        range: (0, 100)
    left margin: 54 
        range: (0, 100)
    mode: NTSC-M 
        supported: NTSC-M, NTSC-443, NTSC-J, PAL-M, PAL-N, PAL, 480p, 576p, 720p@60Hz, 720p@50Hz, 1080i@50Hz, 1080i@60Hz
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x45
    Timestamp:  258522
    Subpixel:   no subpixels
    Clones:    
    CRTCs:      2
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter:

This is from the Device Info:


 /devices/pci0000:00/0000:00:02.0  E: DEVPATH=/devices/pci0000:00/0000:00:02.0
  E: DRIVER=i915
  E: ID_MODEL_FROM_DATABASE=Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller
  E: ID_PCI_CLASS_FROM_DATABASE=Display controller
  E: ID_PCI_INTERFACE_FROM_DATABASE=VGA controller
  E: ID_PCI_SUBCLASS_FROM_DATABASE=VGA compatible controller
  E: ID_VENDOR_FROM_DATABASE=Intel Corporation
  E: MODALIAS=pci:v00008086d000027A2sv0000103Csd000030A2bc03sc00i00
  E: PCI_CLASS=30000
  E: PCI_ID=8086:27A2
  E: PCI_SLOT_NAME=0000:00:02.0
  E: PCI_SUBSYS_ID=103C:30A2
  E: SUBSYSTEM=pci
  E: USEC_INITIALIZED=533879
#2

I had a look at the specs for the NX7300 online and found the native refresh rate is 60Hz (as expected). This is typical for laptop displays in any case.

HP Compaq NX7300 Specifications (Page 17 of 35)

What makes you think it is capable of a higher refresh rate?

#3

I read on the Internet: for safety of eyes the frequency of the display has to be more than 60HZ

#4

IIRC this was mainly referring to older CRT monitors. These screens tended to flicker at frequencies as low as 60 Hz.

#5

Yes, I agree - totally different technology. CRT displays flickered because the phosphor display pixels decay after refresh, and so the electron beam was therefore constantly scanning in a raster pattern in a periodic fashioon. LCD displays have back-lighting, so not subject to the intrinsic flickering of a CRT display.