Posted tagged ‘problem’

ATI Catalyst 9.12 fixes DXVA flicker issue on Radeon cards, improves performance!

19/12/2009

sean_mcnamara Sean McNamara, now with 100% less annoying flicker.

When I first tried DXVA (DirectX Video Acceleration, a technology to offload the CPU by letting the video card render videos.) on my ATI Radeon HD 5770 I noticed a weird issue that would seem to change the brightness of whatever I was watching in-between shots. An angle change would often mean that the brightness would either hop up or go down a few notches. It’s very hard to explain this phenomenon but it was highly disturbing. I didn’t bother looking into it more so I don’t know if only specific software/OS’es were affected, but what I do know is that after installing the Catalyst 9.12 update I have watched an entire episode of Nip/Tuck without any issues, and so it seems resolved. 🙂 (At least in MPC Home Cinema.)

The 9.12 update also boosts an impressive (“up to”) 9% performance increase in 3DMark Vantage and OpenGL 3.2 extension support.

However, they forgot to fix this.

In other news…
You shall listen to this song, because it be awesome.

PHP, MySQL and “Unpredictable behaviour”

20/04/2009

mwp8_lineup2This is what you get when you do a
Google image search for “unpredictable behaviour“.
Truly.

I finally decided to take some time to upgrade my Apache/PHP/SQL installation on ye ‘ol file server, and after installing the latest version of XAMPP (which I warmly recommend if you need a full suite for all your web hosting needs) I was greeted with the following message in phpMyAdmin:

Your PHP MySQL library version 5.0.51a differs from your MySQL server version 5.1.33. This may cause unpredictable behavior.

I figured something must be wrong, spent some time searching for people with the same error – there were plenty of them, but no answer in sight. Finally I was able to come across a few posts that made things clearer.

Apparently the MySQL client version that PHP uses today is  an older version –  of the file libmysql.dll to be precise. Some users have reported that they can simply use a newer build of libmysql.dll (Which can be acquired in the current MySQL build) while other people just show you how to remove the alert by editing the phpMyAdmin source code.

I tried replacing my copy of libmysql.dll with the latest build, but alas –  it just made my php executable lock up, so no luck there for now.

So… what exactly is the deal?
As far as I’ve read, people seem to agree that a small version mismatch poses no problems to the stability of your MySQL server. I am currently running the 5.0.51a client version and 5.1.33 MySQL version without any issues. (Knock on wood!) Although don’t risk it if you have a major version mismatch! (i.e. client is 4.0.1 and server is 5.0.0) because that could truly lead to unpredictable behavior. In these cases, make sure you update to the very latest PHP version available here.

Hope this post saves someone a little time!