MacOS X limited refresh rates.

franckfranck
Posted:
in macOS edited January 2014
Since MacOS X 10.1.5 ( Jaguar included) , all my refresh rates are limited to 75Hz, whatever the resolution I choose.

Under MacOS 9, I can go up to 1280*1024/85Hz or 1024*768/120Hz



Is there a tip somewhere to solve this problem ?



B/W G3, Stock ATI Rage128, Iiyama CRT 17"

Comments

  • Reply 1 of 18
    rick1138rick1138 Posts: 938member
    That sucks 75 is way too low-I don't think I will get Jaquar.120 is the only acceptable.
  • Reply 2 of 18
    ghost_user_nameghost_user_name Posts: 22,667member
    I've had the same problem since Public Beta.



    There's still no fix.



    <img src="graemlins/hmmm.gif" border="0" alt="[Hmmm]" />
  • Reply 3 of 18
    ghost_user_nameghost_user_name Posts: 22,667member
    [quote]Originally posted by Rick1138:

    <strong>That sucks 75 is way too low-I don't think I will get Jaquar.120 is the only acceptable.</strong><hr></blockquote>This is certainly not a reason to keep you from getting Jaguar since this has been a persisting problem sine older Mac OS X versions. The oodles of other fixes and optimizations and new features greatly justifies getting Jaguar, even if some bugs like this are still present.
  • Reply 4 of 18
    rick1138rick1138 Posts: 938member
    Actually I have 10.1.3 installed right now and I can set it to 120 mhz-maybe it has to do with particular displays-one of the things I've liked about OSX is that it allowed high refresh rates without having to install software that might be questionable.For me it is a huge issue-enough to keep me from upgrading-I hate low refresh rates-and contrary to what companies claim I can tell the difference between rtates higher than 85-which is the current supposedly undetectable level-but I can tell the diffence-quite easily-and low refresh rates give me a headache and make it difficult for my eyes to focus.
  • Reply 5 of 18
    ghost_user_nameghost_user_name Posts: 22,667member
    [quote]Originally posted by Xidius:

    <strong>Actually, I doubt this is a bug. More likely a problem they have overlooked,</strong><hr></blockquote>How exactly does that make it not a bug?



    And, btw Xidius, 120 MHz refresh is nothing new. Monitors have been operating at that rate for years. My two-year-old card and monitor support that rate, but OSX never has.



    [ 09-09-2002: Message edited by: Brad ]</p>
  • Reply 6 of 18
    pbg4 dudepbg4 dude Posts: 1,611member
    [quote]Originally posted by Brad:

    <strong>How exactly does that make it not a bug?



    And, btw Xidius, 120 MHz refresh is nothing new. Monitors have been operating at that rate for years. My two-year-old card and monitor support that rate, but OSX never has.

    </strong><hr></blockquote>



    I believe the proper speed is 120 Hz. There is no way in the world that your monitor is refreshing 120 MILLION times per second.



    [ 09-09-2002: Message edited by: PBG4 Dude ]</p>
  • Reply 7 of 18
    rick1138rick1138 Posts: 938member
    120 Hz it is,I stand corrected.By the way,this is in OSX,is anyone else able to do this? I have a 21" CRT Apple Studio Display.
  • Reply 8 of 18
    franckfranck Posts: 135member
    I remember being able to go past 75Hz with various 10.1.X versions, but DON'T install 10.1.5, or you'll be stuck at an awful 75Hz.



    Perhaps it's an issue with non-Apple monitors ?
  • Reply 9 of 18
    monsterjaegermonsterjaeger Posts: 49member
    Same on a Dual 450 with Stock Rage128Pro. Since 10.1.5 I'm stuck at 75Hz and I miss a LOT of resolutions as well. I can't run my 22" CRT at 1600x1200@85Hz which works perfectly in Mac OS 9. A clean install of 10.2 gioves the same limitations to max out at 75Hz, and a limited set of resolutions.

    Do like me and send a BUG REPORT to <a href="http://www.apple.com/macosx/feedback/"; target="_blank">Mac OS X Feedback</a>!
  • Reply 10 of 18
    ti fighterti fighter Posts: 863member
    I have alwase been able to run 1600x1200 85Hz on a sony 21" crt, in 10.1.5 and now jag. w/geforce 4mx. Never had any problems at all, must be a monitor driver issue?
  • Reply 11 of 18
    mount_my_floppymount_my_floppy Posts: 913member
    I can run at 120Hz aswell on some settings usually i run around 1280X1024 at 85Hz
  • Reply 12 of 18
    rick1138rick1138 Posts: 938member
    Do you have Jaguar?
  • Reply 13 of 18
    gullivergulliver Posts: 122member
    [quote]Originally posted by Rick1138:

    <strong>120 Hz it is,I stand corrected.By the way,this is in OSX,is anyone else able to do this? I have a 21" CRT Apple Studio Display.</strong><hr></blockquote>



    My 19" Iiyama VisionMasterPro displays 1280x1024@100Hz. There is an option of 120Hz in 1024x768.
  • Reply 14 of 18
    franckfranck Posts: 135member
    I tried to boot without any monitor attached, but I just got a blank screen, even if my computer still ran fine.
  • Reply 15 of 18
    rick1138rick1138 Posts: 938member
    Gulliver,which OS do you have,I have 10.1.2

    Rick
  • Reply 16 of 18
    tigerwoods99tigerwoods99 Posts: 2,633member
    That is weird, 10.2 lets me go up to 120 Hz no problem if the resolution will do it. I am running at 1600x1200@85 Hz. I would reinstall maybe.
  • Reply 17 of 18
    franckfranck Posts: 135member
    What type of monitor do you have TW99 ? I assume it's not an Apple-branded one.



    I'll try to swith to older ATI128.kext. If I'm still able to boot, may be I'll go past 75Hz.
  • Reply 18 of 18
    arbernautarbernaut Posts: 182member
    Mac OSX

    Mitsubishi Diamond Plus 220

    1600 x 120o

    85 Hz
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