osd notifications blurry

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1374301/+editstatus and add the package name in the text box next to the word Package.

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Can you provide a screenshot of the encountered issue, Andrew? Futhermore what type of session (desktop-environment) are you running?

Here's a picture of the issue
while this notification from Spotify, the issue occurs on all notifications, including system ones

It is possible to start notify-osd with GDK_SCALE=1 and to get high quality notifications. The notifications are not blurry this way and they are scaled correctly in any way. It could be a solution to disable GDK_SCALE for notify-osd, because it is not needed. It looks better without this integer scaling.

Status changed to 'Confirmed' because the bug affects multiple users.

I see this too on a HiDPI display. I was able to workaround it by using Steffen's suggestion:
$ sudo cp /usr/lib/x86_64-linux-gnu/notify-osd /usr/lib/x86_64-linux-gnu/notify-osd.real

Then creating /usr/lib/x86_64-linux-gnu/notify-osd with:
#!/bin/sh
set -e
export GDK_SCALE=1.0
exec /usr/lib/x86_64-linux-gnu/notify-osd.real

Then:
sudo chmod 755 /usr/lib/x86_64-linux-gnu/notify-osd

Test with:
$ sudo killall notify-osd
$ notify-send test

Note: once you are using the above wrapper you will use 'sudo killall notify-osd.real' instead.

I gave this a shot by modifying notify-osd to take device scale into account. Please give the attached branch a go if you own a hidpi display.

This bug was fixed in the package notify-osd - 0.9.35+15.10.20150915-0ubuntu1

---------------
notify-osd (0.9.35+15.10.20150915-0ubuntu1) wily; urgency=medium

  [ Lars Uebernickel ]
  * Render in native resolution on hidpi displays (LP: #1374301)

 -- Sebastien Bacher <email address hidden> Tue, 15 Sep 2015 09:24:19 +0000

I finally got around to testing this. I rebuilt the wily upload on vivid and the results are beautiful. Thanks! :)