Bad Connection via Wifi while running on battery

Hi,
I've been quite happy as after a update of the Airport-Chipset my WIFI network has not to bee selected manually every time after coming back from standby - but I therefore got another problem - when using my WIFI on battery, I do have failed connections (TCP-Sessions) - I also assume packet loss or hard resets of the WIFI connection... as soon as I plug in the power supply, everything's like happy drugs and sunshine...
Anyone sharing my experiences?
Jan

I did more searching and found the answer. It isn't a battery issue but how well the micro HDMI cable fits into the laptop. Check out how to fix your cable here.
https://forums.lenovo.com/t5/Yoga-Flex-Laptops-and/Yoga-2-Pro-micro-HDMi-issue-SOLVED/m-p/1297269/hi...

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W510 checkered pixel patterns while running on battery [workaround]

Hey all, got my W510 in the mail yesterday and am quite pleased with it so far, but I have one issue that I've determined to be related to the power profiles. When using any energy-saving power profile while running off battery power, when I have a flash website (e.g. Nvidia's homepage) open in IE or Chrome or if I move any window around the screen enough, some kind of strange pixel checkering occurs constantly when the screen has too much activity. It's as if every other pixel gets shifted over by one making what looks like a checkerboard out of all the pixels on the screen. I can still read the screen, but it makes my head spin.
If I choose the standard 'Max Performance' power profile, the issue doesn't manifest when running on the battery. If I choose any of the others or create my own profile to mimic the Max Performance profile, I still get the checkers. It still manifests if I go through and turn off all power-saving options or increase the brightness of the backlight. If I start with the Max Performance profile and adjust it to my needs, the problem doesn't occur. Something tells me that the performance profile has something subtly different than all the others and it's not a configurable setting.
Has anyone else experienced this problem? Should I upgrade my Nvidia drivers from version 188.25, which came with the machine? I've read that other people have had issues upgrading their Nvidia driver. The way the system behaves, this seems like a power management issues more than an Nvidia driver issue.
Edit: I should also add that I don't have the issue while running on the AC adapter. Also if I take a screenshot while the pixel shifting occurs, the screenshot is crisp and clear with no signs of the pixel problem. This seems purely hardware/power management related.
Edit: see my later post on adjusting the power settings to work around this issue.
Solved!
Go to Solution.

It's reasonably likely that whatever issue you're seeing is linked to a setting in the NVIDIA Control Panel. So the best diagnostic you can do is, in high-performance mode (where the problem DOESN'T occur), write down the value of EVERY single setting that's available in that control panel.
Then, put the machine in a power mode in which the problem DOES occur. Then again go into the NVIDIA Control Panel and check every single available setting to see if anything has changed. There's a reasonable chance that you'll then find out what setting is causing the problem.
A picture is worth a thousand words, and a video probably ten times that. Taking a close-up shot of the screen while the problem is occuring, with either a still camera or preferably a video camera (or both), may help siginifcantly in diagnosing the problem. A simulated picture may differ in some subtle way from what's really happening, and those subtleties may be important. For instance, does the effect only break up vertical lines, and not horizontal lines? And does it only happen to content that is moving on the screen? And you're running your display at its native resolution, and not some larger or smaller resolution, right? Is the horizontal offset in the effect always just one pixel-width, or is it more than one pixel-width if you move things fast enough?
The simulated picture that you provide looks like it suffers from an artifact that appears WITHIN moving items that are displayed on an interlaced-scan display. The artifact goes away when the item ceases to move. But these aren't supposed to be interlaced displays. And I assume that you're talking about the built-in LCD in the W510, and not some external display, right? If somehow your display card is in interlaced display mode, then the problem probably won't appear in any screenshot the W510 takes of its own display. So at least that part of such a problem would agree with what you're describing.
So maybe the card is in an interlaced display mode when it's not supposed to be. Such a setting would normally be contained under some sort of "Video" menu in the NVIDIA Control Panel.
And from nVIDIA's website:
http://nvidia.custhelp.com/cgi-bin/nvidia.cfg/php/enduser/std_adp.php?p_faqid=2343&p_created=1231528...!!&p_li=&p_topview=1
"Graphics card temperatures typically range from 40°C to 90°C."
The only mention of interlacing that I see on their site for that graphics card is in the "Features" section of:
http://www.nvidia.com/object/product_quadro_fx_880_m_us.html
"PureVideo HD Technology
NVIDIA® PureVideo® technology is the combination of high-definition video processors and software that delivers unprecedented picture clarity, smooth video, accurate color, and precise image scaling for SD and HD video content. Features include, high-quality scaling, spatial temporal de-interlacing, inverse telecine, and high quality HD video playback from DVD."
Plus there are many references to interlace features in the "NVIDIA Accelerated Linux Graphics Driver README and Installation Guide" which covers your video card. And those features are also presumably present in the Windows driver as well:
http://us.download.nvidia.com/XFree86/Linux-x86_64/195.36.08/README/README.txt
One such reference is:
"While [it] is possible to apply de-interlacing algorithms to progressive streams using the techniques outlined in the VDPAU documentation, NVIDIA does not recommend doing so. One is likely to introduce more artifacts due to the inverse telecine process than are removed by detection of bad edits etc."
So maybe it's trying to do spatial temporal de-interlacing when it doesn't need to (I once wrote software to do spatial temporal de-interlacing for a thermal camera, and you don't want that to be turned on when it's not supposed to be turned on). It mentions the de-interlacing in connection with a video mixer feature. So that's another possibility.
Anyway, that should keep you busy, if you want to fix it. ;-) Good luck!

TS4209 When i wake up my iMac from sleep my wifi is disconnected. It also disconnects my iPad, my wives iPad, my iPhone & Sky On Demand which is connected via wifi. To reconnect all devices i have to switch off & then on again wifi on the iMac. Can anyon

When i wake up my iMac from sleep my wifi is disconnected. It also disconnects my iPad, my wives iPad, my iPhone & Sky On Demand which is connected via wifi. To reconnect all devices i have to switch off & then on again wifi on the iMac. Can anyone help?

Had the same issue and finally solved it. After the upgrade to Mavericks our 2 new Macbook Airs stopped connecting automatically to Wifi while the older machines the kids had still worked fine.
Bought a new airport extreme and problem solved. Our Airport Extreme was about 5 years old and was probably not compatible with the new OSX.
BTW this was after trying everything people suggested on this forum and a 4 hour marathon tech support call with Apple where we reinstalled the OSX.
***** to need to spend $200 but glad the problem got solved.
New extreme is also mega fast so its all good.

Anone connecting via wifi?

Greetings!
I've been having troubles downloading HD movie files with iTunes 9.0.2. An other content downloads fine after purchase. Problems come when trying to download any file larger than 2 gig or so.
An Apple expert tells me that the problem is that the PC running iTunes is connected via wifi. Unfortunately, moving the machine or router is not a simple option.
So wondering if anyone out there is downloading HD content via wifi and having any issues, or doing fine?
BTW, I use AppleTV to watch the content from the PC, a connection made via the wifi router without issue.
Thanks!

Works fine for me. I'm using an 8-yr-old Linksys router on 802.11b, set to a channel that doesn't interfere so much with the neighbors.
If this is a new router, check to see if the manufacturer has any firmware updates.

Airport Extreme connected via wifi -- will remote MobileMe still work?

I have two Macs: a desktop and a laptop. I have the latest software and I have MobileMe. My internet is physically connected to the desktop computer. The laptop is connected via wifi using a non-Apple router.
According to Apple's website concerning the AirPort Extreme, "Say you’re traveling and you need a file on the hard drive connected to your AirPort Extreme back at home. If you’re a MobileMe member using Mac OS X Leopard or Snow Leopard, no problem. You can access all the files on your shared drive over the Internet."
My question is this: if I attach an Airport Extreme to the laptop -- which is connected via wifi to the network -- will I still be able to access the attached hard drive via MobileMe while traveling, or does this work only if the Airport Extreme is directly wired to the internet?
Thanks.

Thanks, very helpful.
Say it loud, this is one of the best things of Airport, you control the volume even with the optical output:
¿However, why I can´t do the same with the optical output of my 2008 Mac Mini?
Each one (Mac mini 2008 and Airport Express 2008) have optical link to both receivers (Denon AVR3805 and Denon AVR1905).
But I must control the volume of the mac mini with the remote of the AVR3805.
It seems Airplay makes some magic, but straight driver of OSX over audio device don´t.
What a PIA (Pain in the ***). They can put Gigabits of audio information in the optical link but they can´t add a layer adding a header of some bytes to the packets, adressed to a smart DAC than can control the analog output with two bytes of information.
IEEE, ¿Will you make a layer specification for smart DACs? Life and devices use would be much simpler.
Apple in the meantime makes the magic he is able with Airplay.
Some day.

I recently purcased a Roku which I connected via WiFi. Was unhappy with it so disconnected all. Since that time my Ipad will not connect to the internet. Any suggestions?

I recently purchased a Roku which I connected via WiFi. I was unhappy with it so disconnected everything. Since that time my iPad 1 will not connect to internet although in "settings" it indicated that it is connected. I turned off the WiFi for 30 seconds as was suggested but still the iPad won't conect. Anybody have suggestions as to what might provide a "fix"?

I wonder if the roku changed some other settings in your router or pad.
Recycle the router. Thurn it off for a while, then restart.
On the pad, forget your exiting network. This will cause it to search for avaialbe, and reset again. You will likely need to redo any password/ security entry.
Lastly, in settings, general, reset network connections. You will not lose anything.

Wake Sleeping iMac connected via Wifi

I just got an Airport Express for use on my home network with my iMac.
My main motivations for purchasing this is to use the Apple Remote function on my iPhone to stream music from my iMac via Airplay.
This is working great except I cannot connect when when my iMac goes to sleep.
Under the Energy System Preferences I have "Wake for network access" checked.
However If my iMac goes to sleep for an extended period it will not wake - If I go and jiggle the mouse i notice that it does needs to reconnect to the Airport.
Is there a setting on the iMac or Airpot that I'm missing?
I thought I saw somewhere that you cannot wake a Mac when connected via Wifi - only via Ethernet.
If this is the case i can just run a wire, but I would prefer to use a wireless connection.
I realize i can just use Airplay directly from my iPhone however there are items on my iMac not on my IPhone
Also I need to wake my iMac for remote access.
Thanks
Jeff
Message was edited by: OrboJeff

Under the Energy System Preferences I have "Wake for network access" checked.
This setting only applies to Ethernet connections, and requires a network device to send it a magic packet.
(57041)

I'm able to connect via wifi but not via ethernet

I have a iMac, Mac OS X v10.7.5, and recently had a problem connecting to internet. I can connect via wifi, but when I try connecting via ethernet it's not working. When I go to the preferences > network, it shows "green" / connected for ethernet but when I open up Safari or Firefox, it doesn't show a connection to the internet.

Hi, this has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
old... http://docs.info.apple.com/article.html?artnum=106653
Hi, this has worked for a few...
Though all of these steps may or may not be needed, I'm including them all.
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.5, 10.6, 10.7 & 10.8…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x/10.8.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
If using Wifi/Airport...
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
For 10.5/10.6/10.7/10.8, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
(There may be better or faster DNS numbers in your area, but these should be a good test).
Click OK.
10.5/10.6 instructions, System Preferences>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

Can I share my internet connection via wifi AND use my wireless printer at the same time?

Not completely familiar with wifi capabilities. I have this new setup in my office. I want to share my iMac internet connection via wifi so I can text and check emails using my iPhone (no cell service inside the building). Which works fine. However, I now cannot print wirelessly to my HP printer (LaserJet Pro 400 color). Once Internet sharing is off, I can print just fine. Any other wireless options, or just go get a long USB cable?

Hi,
It is not a multitasking printer, other devices may keep it therefore the best option in this case: connect it to your wireless router and all devices which are conntected to this router can sahre the printer.
Regards.
BH
**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

TS1368 Just changed modems, can connect via wifi with my phone to surf net, but can no longer connect to apple ap store?

Just changed modems, can connect via wifi to surf the net, but can't connect via wifi to update aps in iTunes store

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Just bought new iPod touch. When I connect to computer to sync it tells me "iTunes could not connect to this iPod touch. Could not send a message to device." Not sure if it is b/c of an older version of iTunes but connecting via wifi sync unacceptabl

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What version of iTunes is on the computer? You need at least 11.4.

My ipod touch only connects via wifi, not via cable. The cable works with my iPad, so it's not that. Help?

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1. Turn the router, iPad and printer off.
2. Turn on the router and then wait 30 seconds to let it complete its start-up process.
3. Turn on printer and then wait 30 seconds to let it complete its start-up process.
4. Turn on your iPad and test print.

While running on battery, MacBook Pro crashes after a few minutes of use.

While running on battery, my MacBook Pro crashes (shuts down) after a few minutes (less than 10) of use. Battery indicator still says I have enough power (more than 75%) so it can't be related to the other reported issues with low battery crashes.
While on power adaptor, I don't have any issues.
I checked battery condition as suggested in all the forum threads I can find and its fine.
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PRAM reset did not resolve the issue

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I have an Appl,e AirPort Extreme Base Station (Simultaneous Dual_Band( MC340LL/A. After updating the software, no devices can connect via wifi.

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MacBook Pro (Mid-2009) shuts down while running on battery

Hi,
Five months ago, my MacBook Pro 15'' (2.53Ghz) started showing me the message 'Service Battery'. I took it to an Apple Store and I was told that everything is still fine. Nevertheless, for the past 2 months my laptop shuts down while running on battery (with 20% and 40% levels of charge) periodically. This does not happen every time.
Does anyone know if AppleCare covers this failure?
Is there any other way to fix this?
Thank you,
George

Mine does the same thing. May i suggest downloading istat pro to look at the health of your battery.
http://www.apple.com/downloads/dashboard/status/istatpro.html
Also do you calibrate your battery?
http://support.apple.com/kb/HT1490
I had never done that but after 15 months and 450+ cycles I was experiencing the same problem. I am a heavy user of my mbp 15" (2.4Ghz). After calibrating my health in istat which was going between 30-53 % Is holding steady around 65-mid 70% health wise. I have also noticed that my battery icon has gone from service battery to replace now to holding at replace soon for the time being.
I am not sure how many cycles you can get out of one battery but as far as i know 700ish is good. While i wish i was closer to an apple store (3ish hrs or more) i do hope i have helped you.

Bad Connection via Wifi while running on battery

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