Refresh Rate in X Windows (SOLVED)

schmmd · 2006-09-21 20:03:27

I set up an xorg.conf and it recognizes the attached monitor, but it displays with a refresh rate of 60. I would like the refresh rate of 76. In the radeon driver's output, it states that it recognizes the monitor can handle 1280x1024 at 76. Does anyone know what I need to change so I can get the higher refresh rate?

I am guessing that this is the reason for the poor display quality.

archuser · 2006-09-21 20:11:33

I think ddc is probably what you want.

pacman -Ss ddc

extra/ddcxinfo-arch 0.8-1
utility to probe non/ddc monitors - used by hwd

HTH

schmmd · 2006-09-22 01:44:03

I do have DDC. It correctly recognizes the monitor. The problem is that the monitor operates both at 60 Hz and 76 Hz. I'm guessing the low-quality image is due to the fact that it is running at 60 Hz.

(II) RADEON(0): I2C bus "DDC" initialized.
(II) RADEON(0): Legacy BIOS detected
(II) RADEON(0): LVDS port is not in connector table, added in.
(II) RADEON(0): Connector0: DDCType-0, DACType-1, TMDSType--1, ConnectorType-1
(II) RADEON(0): Connector1: DDCType-3, DACType-0, TMDSType--1, ConnectorType-2
(II) RADEON(0): I2C device "DDC:ddc2" registered at address 0xA0.
(II) RADEON(0): I2C device "DDC:ddc2" removed.
(II) RADEON(0): DDC Type: 3, Detected Type: 1
(II) RADEON(0): EDID data from the display on port 1 ----------------------
(II) RADEON(0): Manufacturer: SHP  Model: 20f2  Serial#: 16843009
(II) RADEON(0): Year: 2004  Week: 28
(II) RADEON(0): EDID Version: 1.3
(II) RADEON(0): Analog Display Input,  Input Voltage Level: 0.700/0.300 V
(II) RADEON(0): Sync:  Separate  Composite  SyncOnGreen
(II) RADEON(0): Max H-Image Size [cm]: horiz.: 38  vert.: 30
(II) RADEON(0): Gamma: 2.20
(II) RADEON(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display
(II) RADEON(0): First detailed timing is preferred mode
(II) RADEON(0): redX: 0.639 redY: 0.342   greenX: 0.297 greenY: 0.615
(II) RADEON(0): blueX: 0.146 blueY: 0.068   whiteX: 0.313 whiteY: 0.329
(II) RADEON(0): Supported VESA Video Modes:
(II) RADEON(0): 720x400@70Hz
(II) RADEON(0): 640x480@60Hz
(II) RADEON(0): 640x480@67Hz
(II) RADEON(0): 640x480@72Hz
(II) RADEON(0): 640x480@75Hz
(II) RADEON(0): 800x600@56Hz
(II) RADEON(0): 800x600@60Hz
(II) RADEON(0): 800x600@72Hz
(II) RADEON(0): 800x600@75Hz
(II) RADEON(0): 832x624@75Hz
(II) RADEON(0): 1024x768@60Hz
(II) RADEON(0): 1024x768@70Hz
(II) RADEON(0): 1024x768@75Hz
(II) RADEON(0): 1280x1024@75Hz
(II) RADEON(0): 1152x870@75Hz
(II) RADEON(0): Manufacturer's mask: 0
(II) RADEON(0): Supported Future Video Modes:
(II) RADEON(0): #0: hsize: 1280  vsize 1024  refresh: 60  vid: 32897
(II) RADEON(0): #1: hsize: 1280  vsize 960  refresh: 60  vid: 16513
(II) RADEON(0): #2: hsize: 1280  vsize 1024  refresh: 67  vid: 34689
(II) RADEON(0): #3: hsize: 1152  vsize 864  refresh: 75  vid: 20337
(II) RADEON(0): #4: hsize: 1024  vsize 768  refresh: 66  vid: 18017
(II) RADEON(0): #5: hsize: 1280  vsize 1024  refresh: 76  vid: 36993
(II) RADEON(0): Supported additional Video Mode:
(II) RADEON(0): clock: 108.0 MHz   Image Size:  338 x 270 mm
(II) RADEON(0): h_active: 1280  h_sync: 1328  h_sync_end 1440 h_blank_end 1688 h_border: 0
(II) RADEON(0): v_active: 1024  v_sync: 1025  v_sync_end 1028 v_blanking: 1066 v_border: 0
(II) RADEON(0): Serial No: 4H046497
(II) RADEON(0): Monitor name: LL-191A-B
(II) RADEON(0): Ranges: V min: 50  V max: 77 Hz, H min: 24  H max: 82 kHz, PixClock max 140 MHz
(II) RADEON(0):
(II) RADEON(0): Primary:
 Monitor   -- CRT
 Connector -- VGA
 DAC Type  -- Primary
 TMDS Type -- NONE
 DDC Type  -- VGA_DDC
(II) RADEON(0): Secondary:
 Monitor   -- NONE
 Connector -- Proprietary
 DAC Type  -- TVDAC/ExtDAC
 TMDS Type -- NONE
 DDC Type  -- NONE

cheer · 2006-09-22 03:47:30

Maybe gtf? Then copy its output to monitor section.

Lone_Wolf · 2006-09-22 15:49:48

Iirc you can add the refresh rate to a mode in xorg.conf .

Try putting 1024x768@76 instead of 1024x768 in the Modes lines in the Screen section.

NOTE : make a copy of your xorg.conf first just in case something goes wrong.

colnago · 2006-09-22 17:47:40

Continuing on Lone_Wolf's suggestion, you could also try creating the correct modeline for your monitor. I use a KVM switch, so I have to do this all of the time to get a proper refresh rate.

From this:

(II) RADEON(0): clock: 108.0 MHz   Image Size:  338 x 270 mm
(II) RADEON(0): h_active: 1280  h_sync: 1328  h_sync_end 1440 h_blank_end 1688 h_border: 0
(II) RADEON(0): v_active: 1024  v_sync: 1025  v_sync_end 1028 v_blanking: 1066 v_border: 0

You can determine that the modeline should be:

Modeline "1280x1024" 108.0 1280 1328 1440 1688 1024 1025 1028 1066

(http://wiki.x.org/wiki/FAQVideoModes)

schmmd · 2006-09-22 18:57:54

Cool. Thanks. That did the trick!

toxic · 2006-09-22 19:25:33

colnago wrote:

Continuing on Lone_Wolf's suggestion, you could also try creating the correct modeline for your monitor. I use a KVM switch, so I have to do this all of the time to get a proper refresh rate.

I'm just curious, using a KVM switch you share 1 monitor, 1 keyboard, 1 mouse for two computers, why does that make you change refresh rates all the time ? I'm using a KVM switch myself, and I have no problems with it. Once a script's been loaded, it statys that way, and I have the same settings in my xorg.conf for both computers.

colnago · 2006-09-22 20:18:10

My language was unclear. I don't have to change it once it is set.

I have a 4-up switch and two of the computers are used as test systems. I reinstall a lot and thus have to set the modeline 'all of the time'. The issue is that the kvm does not reliably pass the monitor info to the OS. This is true with M$ as well.

I actually have several KVMs, all of which date from 2000/2001. I wonder if these are getting better now?

toxic · 2006-09-22 21:50:40

hehe, ok I was just curious.

Well, about the quality of KVM switches, the simple answer would be no. It's basically just a set of cables, and a hardware switch, emulating keyabord/mouse etc between computers. The only difference the way I see it is newer models switch on a certain keypress combination rather than actually pressing a button. But that's not exaclty new technique, and it may very well be so that you already have that feature.

So, other then that it's just a piece of wire, and there' no quality improvements there really.

Arch Linux

#1 2006-09-21 20:03:27

Refresh Rate in X Windows (SOLVED)

#2 2006-09-21 20:11:33

Re: Refresh Rate in X Windows (SOLVED)

#3 2006-09-22 01:44:03

Re: Refresh Rate in X Windows (SOLVED)

#4 2006-09-22 03:47:30

Re: Refresh Rate in X Windows (SOLVED)

#5 2006-09-22 15:49:48

Re: Refresh Rate in X Windows (SOLVED)

#6 2006-09-22 17:47:40

Re: Refresh Rate in X Windows (SOLVED)

#7 2006-09-22 18:57:54

Re: Refresh Rate in X Windows (SOLVED)

#8 2006-09-22 19:25:33

Re: Refresh Rate in X Windows (SOLVED)

#9 2006-09-22 20:18:10

Re: Refresh Rate in X Windows (SOLVED)

#10 2006-09-22 21:50:40

Re: Refresh Rate in X Windows (SOLVED)

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