This is one of the bugs that prevent IDEA to switching to JDK7/8 for IntelliJ by default. The JDK is perceived by a lot of users as an ill-behaved application on OS X because it forces use of the discrete GPU, drastically reducing battery life.
This patch didn't work for me either, on a 2014 15" retina mbp. On 28 May 2015 at 07:53, Phil Race <philip.r...@oracle.com> wrote: > Hello Denis, > > Once lots of people start to use the integrated CPU I suppose there is a > non-zero > likelihood of crashes and other problems with that too. > I would like to see this (a) selected based on battery or similar, not > fixed, > (b) made controllable by a flag or similar, > and once that is done, get a lot of JDK9 bake time. > To be suitable for JDK 8u it would have to be "off by default". > > -phil. > > > On 05/27/2015 02:44 PM, Denis Fokin wrote: >> >> Hi Phil, >> >> Thank you for the comments. Actually, the battery life is not the only >> issue that experience our customers. I am getting crash reports that are >> reproducible only with discrete cards on MBP. Some users report hangs with >> discrete cards. All this issues are eliminated by switching on the >> integrated GPU. I am not sure, that discrete card gives significant >> performance improvement in jdk implementation. Other applications, like >> Chrome, use discrete video card only for WebGl or similar tasks. >> >> Thank you, >> Denis >> >> >>> 27 мая 2015 г., в 21:09, Phil Race <philip.r...@oracle.com> написал(а): >>> >>> I suppose that NSOpenGLPFAAllowOfflineRenderers must prevent whatever >>> 'tickling' >>> of the discrete GPU we do from automatically making it the active GPU ? >>> >>> This seems to merit a source code comment as at face value it seems like >>> an API that allows >>> you to use that (other) discrete GPU alongside the active GPU, but so we >>> don't >>> need that part, just the side-effect behaviour. >>> >>> But do we want this fix in this form ? The integrated GPU is going to >>> perform far less well >>> than the discrete GPU. If the issue is battery life, then perhaps it >>> should be tied >>> to whether we are running on battery or mains power. And then perhaps you >>> need to figure out >>> how to switch GPU on the fly when you go from mains to battery. >>> >>> >>> -phil. >>> >>> >>> >>>> On 05/27/2015 08:08 AM, Denis Fokin wrote: >>>> Hi, Sergey, >>>> >>>> Basically, you should close all apps that can switch the vc including >>>> the utility for switching video cards. Make sure in About This Mac -> >>>> Displays that the integrated card is enabled. Start an application with the >>>> patched version of Java. Check About This Mac -> Displays. Integrated video >>>> card should be still active. >>>> >>>> >>>> >>>>> 27 мая 2015 г., в 17:30, Sergey Bylokhov <sergey.bylok...@oracle.com> >>>>> написал(а): >>>>> >>>>> Hi, Denis. >>>>> Can you describe the steps on how to test it. On my mac it still change >>>>> the vc. >>>>> >>>>>> On 27.05.15 17:16, Denis Fokin wrote: >>>>>> Please review the fix for jdk9 >>>>>> >>>>>> The fix allows do not force discrete video card usage on MacBook Pro >>>>>> models with two video cards. I have tested the fix on several MPBs. >>>>>> >>>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8041900 >>>>>> Webrev: http://cr.openjdk.java.net/~denis/8041900/webrev.00 >>>>>> <http://cr.openjdk.java.net/%7Edenis/8041900/webrev.00> >>>>> >>>>> -- >>>>> Best regards, Sergey. > > -- -Tor