0

I'm using GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21) of 2015-04-10 on builder10-9.porkrind.org (from emacsformacosx.com) and I've got this annoying transparency going on and I don't know how to disable it. See attached image (it's not easy to spot but it's there).

Took a photo with my phone since it's not screen-grab-able

4
  • Can you describe what the problem is because it is hard to spot whatever is the spot you are referring to? Start with location of the spot. – Emacs User Jun 14 '15 at 23:55
  • 1
    Do you mean the transparency of the title bar? That is a OSX Mavericks feature, it is not emacs specific. – Jordon Biondo Jun 15 '15 at 1:01
  • I've added another photo (took it with my phone) since I realised the issue is not noticeable in the screenshot. I'm pretty sure now it's got nothing to do with Emacs since I can see the issue on other apps too but maybe someone knows about it. – Cezar Jun 17 '15 at 20:31
  • 1
    It's possible the alpha frame parameter is set to something other than 100 (full opacity). Try evaluating (set-frame-parameter (selected-frame) 'alpha 100) and let us know if you're still seeing the transparency issue. – Dan Jun 17 '15 at 20:43
1

If you're working on a MBPro Retina or Thunderbolt Display, or any display that uses in-plane switching (IPS) technology, your issue is likely image persistence.

I was experiencing the same problem on my Mac with all programs. I would close or hide a window (or Emacs frame), and I could see a very faint remnant of that window (frame). It also occurred when I switched OS X 'spaces.'

After putting it off for some time your question prompted me to finally investigate the issue. I would recommend Apple's article on Avoiding image persistence on Apple displays. The punchline:

To clear the persistent image, allow the screen saver to run for approximately as long as the image was being displayed.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.