Hi, The funny thing about this is, I have a Mac Mini with the VGA adaptor. Everything is slow until I connect the monitor. Now here's the funny thing, I just connected the VGA cable, the monitor is not even plugged into power. Guess what, the Mac is happy. Chris
On Thu, 29 Oct 2009 09:59:33 -0400 Chris Blouch <cblo...@aol.com> wrote: > I'm guessing that the Mac is constantly scanning for monitor presence > when none are hooked up. With an actual VGA or DVI display hooked up the > Mac can query the display for information such as supported resolutions > and refresh rates. So a DVI to VGA adapter doesn't help because the Mac > is still trying to query the display, and apparently often enough to > slow everything down. The 'video' adapter lets a mac display on either > NTSC or PAL television screens. The adapter has both an RCA composite > and ADB style SVideo connector. Neither of these has any query > capability and it's not needed because PAL and NTSC are fixed > resolutions/scan rates. So plugging in one of these adapters stops the > Mac from polling the display and makes everything happy. Might be a > hardware level bug with the video controller holding things up while it > tries to query the non-existent display forever. Apple really should fix > this so the machine doesn't slow down when no display is attached, but > they probably consider it an edge case. I wonder what the percentage of > non-screen mac users is, even among the blind? > > CB > > John André Netland wrote: > > Esther, > > > > Do you know what is the correct adaptor to use for desktop computers > > like G5, Mac pro etc. I have tried running those machines without > > monitors but with a video adaptor. It has a flat USB like plug in the > > other end of a cable, but the plug is wider than USB, common to > > connect to modern video inputs. This setup did however still cause the > > Macs to be slow. As soon as the monitors where connected again, the > > issue disappeared. > > > > Thanks, > > John André > > > > > > On 29. okt. 2009, at 05.05, Esther wrote: > > > > > >> Hi Doug, > >> > >> I'll point you to a Mail Archive list post that gives links to the > >> correct video adapters for both new Mac Mini models (since March 3, > >> 2009 -- with Mini-DVI ports -- "Apple Mini-DVI to Video Adapter") > >> and for the older Mac Mini models with DVI ports (manufactured > >> before Mach 2009 --- I guess your Mac Mini might be in this > >> category) -- these use "Apple DVI to video adapters. > >> > >> http://www.mail-archive.com/macvisionaries%40googlegroups.com/msg02152.html > >> > >> The post links to actual product pages in Apple's Store, to avoid > >> problems. Do NOT get the connector that attaches the Mini to a > >> Monitor -- unless you really have a monitor at the other end, this > >> will not help at all. The monitor connectors are bi-directional, so > >> it is possible for the Mac Mini to sense whether there really is a > >> monitor at the other end. The video adapter connectors have a round > >> protruding plug in the connector unlike the flat VGA end of monitor > >> adapter connectors. The signal only goes outward, so the Mac Mini > >> gets not input to inform it that there is no video device at the > >> other end. I don't trust myself to type the product codes correctly > >> here, but they are correct in the linked post as long as you > >> correctly identify whether you have a new (post March 2009) or old > >> (before March 2009) Mac Mini model. When in doubt, Google the Apple > >> Support page and type in your Computer's serial number in the search > >> field, and your model will be identified. (Navigate with VO-M to > >> Apple Menu on menu bar, arrow down to "About this Mac", where the > >> operating version number is announced route your mouse cursor to > >> VoiceOver cursor with VO-Command-F5 and click twice with VO-Shift- > >> Space. Move off and onto this field to read the serial number and > >> copy it to your pasteboard with VO-Shift-C. Then you can paste it > >> into a TextEdit window, or you can interact and VO-Right arrow to > >> just the actual serial number and copy it with VO-Shift-C, then > >> paste with Command-V into the Support page search field. > >> > >> HTH > >> > >> Cheers, > >> > >> Esther > >> > >> > >> Doug Lee wrote: > >> > >>> I have no compatible monitor at this location, but I just heard of > >>> some sort of "dongle" that's supposed to fool the machine into > >>> thinking I have one. Any info on where to obtain such a thing? > >>> > >>> On Wed, Oct 28, 2009 at 05:36:22PM -0700, Mac Cougar wrote: > >>> > >>> Plug in a monitor for the performance issues. > >>> On Oct 28, 2009, at 4:48 PM, Doug Lee wrote: > >>> > >>> > >>>> Last Friday I installed Snow Leopard as an upgrade of Leopard on my > >>>> Mac Mini. I also installed the newer Xcode from the Snow Leopard CD > >>>> over the Xcode I already had. I finally reinstalled the Ports > >>>> package, though I did not recompile all my ports yet. > >>>> > >>>> But I got a number of very nasty surprises that seem uncommon, so > >>>> I'm > >>>> hoping someone out there has an idea what on Earth hit the fan here. > >>>> I have tested the below findings with no ports running as far as I > >>>> know. > >>>> > >>>> Problems include: > >>>> > >>>> 1. Safari is hopelessly slow! Navigating from one site to another, > >>>> such as by typing in the address field, can take a full minute, > >>>> during which VoiceOver occasionally says, "Safari busy." Similarly, > >>>> getting to the menu bar with VO+M and moving among menu bar options > >>>> with arrows can take up to a full minute per keystroke. > >>>> > >>>> 2. Typing into any edit control I tried, mostly TextEdit and Skype > >>>> chat boxes, seems to cause the Mac to get behind, with or (I think) > >>>> without VoiceOver running. With VO running, if I type reasonably > >>>> fast, VO loses the ability to say the characters I type, goes silent > >>>> for a moment, then starts saying "busy" once for each key I hit. > >>>> I'm > >>>> used to hearing individual characters as feedback against errors, > >>>> and > >>>> VO under Leopard handled that just fine. > >>>> > >>>> 3. Though some people claim that commands like VO+F2 for window name > >>>> and VO+Shift+F3 for Cursor Tracking toggle still work in Snow > >>>> Leopard, > >>>> I (and one friend) find these commands do nothing now. I believe > >>>> the > >>>> Commands help still documents them though. Removing and making VO > >>>> rebuild all preference files did not solve this. > >>>> > >>>> Any pointers will be most graciously accepted. This machine has a > >>>> 300 > >>>> gig drive with only 30 gig free, and I have as yet no device > >>>> elsewhere > >>>> with enough free space to afford me the option of a complete > >>>> backup/format/restore. > >>>> > >>>> > >>>> -- > >>>> Doug Lee d...@dlee.org http://www.dlee.org > >>>> SSB BART Group doug....@ssbbartgroup.com > >>>> http://www.ssbbartgroup.com > >>>> "When there is no enemy within, the enemies outside cannot hurt > >>>> you." > >>>> --African Proverb > >>>> > >>>> > >>> > >>> > >>> -- > >>> Doug Lee d...@dlee.org http://www.dlee.org > >>> SSB BART Group doug....@ssbbartgroup.com > >>> http://www.ssbbartgroup.com > >>> "The most exhausting thing in life is being insincere." > >>> - Anne Morrow Lindbergh {American Author} > >>> > >>> > >>> > > > > > > > > > > -- Chris G <cgrabowsk...@gmail.com> --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "MacVisionaries" group. 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