Updated FAQ (markdown)

FAQ.md

@@ -97,6 +97,26 @@ Service.CFG <Error> core\hle\service\cfg\cfg.cpp:Service::CFG::GetConfigInfoBloc
 
 In this case, try deleting the file at `user/nand/data/00000000000000000000000000000000/sysdata/00010017/00000000/config` and running the latest version of Citra. If this does not work, then note the config block number (`0xA0001` in the example) and file a bug report.
 
+#### How can I fix the "API ERROR 1282 OPENGL" ? I can't figure that out by changing ROM and Version !
+
+This is all about third-part applications : there are some GPU/CPU utilities that use to monitor the GPU/CPU usage to control SpeedFan (or something link).
+Citra could have some problems related to this applications,the API Error 1282 is one of these cases,you could keep on getting this console error :
+
+```
+ Render.OpenGL <Error> video_core\renderer_opengl\renderer_opengl.cpp:DebugHandler:469: API ERROR 1282: GL_INVALID_OPERATION error generated. Function glMatrixMode is deprecated and not available in preview contexts.
+
+```
+
+It could be also "Vertex Core" or something like. Well,just kill those processes related to Gpu/CPU Utilities,be careful,there are lots of utilies working smoothly with Citra,like : 
+- Zotac FireStorm
+- Speccy
+- Steam
+- Origin
+- geForce Experience
+
+MSI Afterburner was ,in some cases,the application responsable of the error,some users could figure that out by closing it.
+
+
 #### Where is the folder for the emulated SD card?
 
 The folder for the emulated SD card is named `sdmc`.