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Posts Tagged ‘Update’

If you’ve been getting blue faces when watching YouTube clips, or any other Adobe Flash videos, the cause can be hard to pinpoint. When faces and flames, and other red/orange elements, turn varying shades of blue, it can be due to a buggy Flash update (especially for 64-bit users), or it can be due to video card driver issues (currently it seems to be affects a few Nvidia users after upgrading to Ubuntu 12.04 – read more at the bottom). Whatever the cause, this issue usually drives people to uninstall Flash, then reinstall an earlier version.

But hopefully the following fix will correct the colours in the movies you watch in Firefox or Chrome (and any other web browsers) without having to resort to such drastic measures. All you need to do is create a text file and paste a line of text into it, but since saving it will fail unless you create the folder first, do so by running the following in the terminal:

sudo mkdir /etc/adobe/

Now to create the file and open it for editing:

gksu gedit /etc/adobe/mms.cfg

When it opens, paste in the following:

EnableLinuxHWVideoDecode=1

Close the file, and confirm you want to save the changes. Now, all you need to do is restart your browser and your clips should look fine. If not, you may need to reboot, and hopefully all is fine when you return.

The EASY WAY: Now that you understand what’s needed, you could cheat and just do the whole process with one command:

sudo mkdir /etc/adobe/ && echo -e "EnableLinuxHWVideoDecode=1" | sudo tee /etc/adobe/mms.cfg > /dev/null

If you also want to force the Flash player to bypass its GPU validity checks (GPU validation – see below), then the command would be:

sudo mkdir /etc/adobe/ && echo -e "OverrideGPUValidation=1\nEnableLinuxHWVideoDecode=1" | sudo tee /etc/adobe/mms.cfg > /dev/null

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That Didn’t Work, or Caused Problems? In some cases, you might find you need to disable GPU validation in addition to, or instead of, telling Flash to use vdpau hardware acceleration. If you’re experiencing trouble at some sites but not others (like YouTube videos are now fine, but at Vimeo the Flash plugin crashes), you may want to play around with the settings. For example, to enable the acceleration but bypass GPU validation, the text in mms.cfg would be:

OverrideGPUValidation=1
EnableLinuxHWVideoDecode=1

… or the following to just bypass GPU validation:

OverrideGPUValidation=1
EnableLinuxHWVideoDecode=0

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To Revert Back: If these tweaks have caused you more headache than it was worth, just delete the entire folder you created with:

sudo rm -r /etc/adobe

Or you can just edit the file with:

gksu gedit /etc/adobe/mms.cfg

… and set EnableLinuxHWVideoDecode= to 0 if you prefer to keep it.

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Nvidia users: Apparently the issue (which Adobe reportedly won’t be fixing) is caused by having hardware acceleration enabled, so right-clicking a Flash video, choosing Settings… and disabling “Enable hardware acceleration” can often fix this. However, the above fix is perhaps more elegant since you’re allowing Flash to use vdpau hardware acceleration, rather than just disabling it altogether.

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If you upgraded to Ubuntu 11.04, you might find that some of your familiar icons in the notification area of your panel’s system tray are missing. These will include such system apps as the Update Manager, but more importantly those programs you are running that usually put icons or indicators there.

Some of these might be used for bringing the related programs to the foreground (which is the only way to access those that disappear when minimised, like Firestarter and Vuze), while others are completely useless if not shown in the notification area. A good example of the latter is Parcellite, a clipboard manager which sits in the system tray, and which you can’t access any other way.

So, in Unity, you might not even be sure certain apps are running, without opening the System Monitor. They’re actually open and still trying to put their icons there, but are being prevented by a default Unity setting. But it’s easy to fix, either by the hands-on/visual approach, or the quicker command-line method.

Dconf Editor

First off, if you don’t have Dconf Editor installed, do so by entering the following into a terminal:

sudo apt-get install dconf-tools

To open it, hit Alt+F2 and enter dconf-editor. Navigate to desktop > unity > panel, where the value for the systray-whitelist entry should look something like: [‘JavaEmbeddedFrame’, ‘Mumble’, ‘Wine’, ‘Skype’, ‘hp-systray’, ‘scp-dbus-service’]

You can manually add programs and indicators to it (eg: [‘JavaEmbeddedFrame’, ‘Mumble’, ‘Wine’, ‘Skype’, ‘hp-systray’, ‘scp-dbus-service’, ‘your-indicator-here’]), or you can just get it to show all notifications (which would be preferable, since any programs you install in the future would be included there).

Simply click the systray-whitelist entry and type ['all'] over what is there. That should restore all your usual system tray icons, which were always running, just not visible. To complete this, you will need to run (via Alt+F2) unity --replace to refresh Unity.

Terminal Command

It’s even easier to do this via the terminal (or Alt+F2):

gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"

Once again, you’ll need to refresh Unity to see your changes.

Extra Notes

No Notifications: If you actually want no notifications showing up, leave the value empty. Actually, it will need to be [”] (that’s two single-quotes inside the box bracket), which you can do manually, or by the following command:

gsettings set com.canonical.Unity.Panel systray-whitelist "['']"

Don’t Refresh Unity in Terminal: Use Alt+F2 to refresh Unity, as while running unity --replace in the terminal is fine, if you halt that process, or close the terminal window, Unity will crash. While that isn’t a major deal, it will however leave you without a way to rectify this, as Alt+F2 will not produce the Run dialogue (since the panel isn’t running – which also means no way to log out or restart). You may also find that if you manage to get a terminal up (like if you have a launcher for it on your desktop), you won’t be able to type anything into it.

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Did this information make your day? Did it rescue you from hours of headache? Then please consider making a donation via PayPal, to buy me a donut, beer, or some fish’n’chips for my time and effort! Many thanks!

Buy Ubuntu Genius a Beer to say Thanks!

Read Full Post »