[SOLVED] full screen lags

Message

moment92 · Post by **moment92** » Wed Feb 23, 2011 3:16 pm

Adobe flash player lags on full screen, so that it is impossible to watch a video. Other players show fullscreen correctly. Someone told me about 2 months ago, that it is a problem with missing flashplayer support of graphics accelaration for linux and there is nothing I can do to fix the problem.. However, I noticed that Ubuntu plays them well enaugh in full screen (dual boot) on the same computer. So I need some advice to get fullscreen working on gentoo as well.

BitJam · Post by **BitJam** » Thu Feb 24, 2011 12:59 am

First, you might find it useful to install an app that monitors CPU usage so you know what is going on. Both conky and gkrellm can do this. If you don't want to bother with configuration, htop, which is text based, works too. I prefer gkrellm and conky because they give you a graph of CPU usage over time while htop just gives you the current usage. Whenever I install a version of Linux, one of the first things I do is install a system monitor (usually gkrellm) so I can see what the system is doing. At a minimum, I always like to see CPU usage, memory usage, disk IO, and network activity. You can install one of these tools on the Ubuntu side as well so you can see what is happening there.

I believe Flash now has hardware acceleration support for 32-bit Linux but not 64-bit Linux. So if you are running 32-bit Ubuntu and 64-bit Gentoo, this might explain the discrepancy, but there are many other possible explanations as well. For example, you might be using a version of Flash on Gentoo that doesn't support hardware acceleration.

moment92 · Post by **moment92** » Sun Feb 27, 2011 8:43 pm

Both systems are 32bit, so that should not be the problem. I also checked the adobe-flash versions and they are exactly the same on ubuntu and gentoo (10.2.152.27). I also tried nspluginwrapper and it made absolutely no difference, the result was as bad as before.

I installed gkrellm, but I'm afraid that I don't know how to use it well. The only things that I can read out of the statistics it shows is that my dual core 1.8GHz processor uses about 30% of power for small screen and about 90% for full screen on Ubuntu. On gentoo, watching video on small screen seemed to be using less cpu, only 15%, watching on full screen used 90% or more and lagged awfully. Video used exactly the same amount of memory in full screen and small screen on gentoo.

Could there be a driver issue? I have ATI Radeon Express 1200. I have no clue about the cause of the problem.

BitJam · Post by **BitJam** » Sun Feb 27, 2011 9:03 pm

I agree. It sounds like a driver issue. A quick Google(linux radeon flash) led to this post where someone had a very similar problem. If their solution doesn't work for you, Google around a bit and you will probably find a solution that does work.

IMO closed-source Flash + closed-source video drivers = Large PITA. I've recently had strange problems with Flash and the Nvidia driver.

BTW: right-clicking on GKrellM brings up a configuration menu. There are many themes available for customizing the look. I've been using a modified version of the transparent "invisible" theme.

moment92 · Post by **moment92** » Sun Feb 27, 2011 10:26 pm

I found out the problem. I had configured the kernel incorrectly, I needed to enable Direct Rendering Manager and Radeon modesetting, after that full screen started to work.