Emulator

Will reproduce and report detailed information.

First thing you should do is figure out when it stopped working for you, that would help us see what could be going on.

http://pastebin.com/5amiQS0i
Here is a slew of log output while trying to scan the ship and failing.

I've never played this game before via Dolphin, so it may take some time for me to jump back far enough to find a working version.

Okay, I just jumped to the oldest binary package I had built (10/26/14, Dolphin 4.0-3842) and the scan visor was working normally (I was able to scan Samus' ship)

Since this is so old, I will have to go through some more to properly bisect.

Okay. Take your time, as long as we figure out when it got broke it'll make fixing it much easier.

Thanks for your support on the issue. Over the weekend(maybe even this afternoon) I will be able to go through and find it; it's been a busy week.

I can confirm this for Metroid Prime 3 from the trilogy. It happens in D3D mode, but not in OpenGL. Of the builds i have scan works correctly on 5168 and 5254, but is bugged on 5357 and 5384.

OS windows 8.1 x64
Core i5 750 @2.7
Nvidia GTX 570

I have experienced the exact same problem. It only occurs on objects that are large enough, like those huge gates that you need to scan to open (those with some kind of mechanism with a hologram of different colors depending of the security level right in front of them), the ship of the space marines, which is huge enough, and after that zone, where you first meet the shadow foes, there's an area where you should shoot a missile to a huge wall for it to partially broke, you can't scan that wall too.

I also noticed that when I try to scan some of those objects while looking up (Look up with R-Trigger and then try to scan the object with Samus still looking up) the camera angle will get instantly horizontal and just lock the camera's direction (As if I never looked up with R-Trigger and I just pressed L-Trigger with no object in front that could be scanned)

I tried several versions and it broke in 4.0-5347, which claims to have removed several code for D3D. Maybe there was some code needed for the scan visor to work properly with lage objects

I'll just go ahead and chime in; that pull request doesn't fix the issue over here (Linux/OpenGL renderer). I grabbed your changes and went ahead and did a build to test. Considering as it's happened to people with both D3D and the OpenGL backend, it must be something else going on. There's a better range of commits to test against now, since we've narrowed down the date somewhat (It was still working in December)

I imagined as such. Thanks for the relabeling, I'll continue to hunt for a breaking commit.

I'm running into the same issue as well, also running a similar setup as OP (Nick):

OS: Ubuntu 14.04 LTS (Kernel 3.13.0-44-generic) x86_64
CPU: Core2 Quad X3220 @ 3.0Ghz (8GB ram)
GPU: Nvidia GTX 570 with binary driver 346.35 installed.

From the begining of the game, if you get to the first boss (the Dark Alpha Splinter) and speak with U-Mos (on the second floor), when you have to get to the next part which is scan one of the violet holograph doors back on the first floor/boss fight area - the game snaps to view as if it were going to scan but doesn't. Some items do scan, but that is a deal-breaker as it won't let you proceed further. I've also noticed it was doing that with some other things from the start of the game, but didn't think much of it untill I was stuck in that temple area.

Currently I got it to play by using a older version 4.0.2 installed via terminal (apt-get install dolphin-emu) and it lets me scan everything normally. I'll see if I can get around to trying other versions - using the packages from the site gives me some unmet dependency errors.

Newer versions I've built from source work very smooth with other games, including the first Metroid Prime and has rumble support working. Hopefully that bit of info might be helpful in reproducing the error in question.

Even though the issue has already been solved, I want to say I came here for a similar problem but solved it just removing the enhancements Anisotropic filtering and Anti-Aliasing, my problem was just with some RED objects, some doors special doors in Santuary Temple. Had this issue on 4.0 6860 and now with 5.0(RC).

As mentioned in the forums here: https://forums.dolphin-emu.org/Thread-wii-metroid-prime-trilogy--26043?pid=378971#pid378971

This issue seems to have returned in some form in Dolphin-6422 with this pull request: https://github.com/dolphin-emu/dolphin/pull/2448

Before this change D3D backend worked when scan visor when AA was disabled. After this change scan visor issues occur under D3D backend but not opengl.