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FAQ
A: A lot has changed! Please check the dedicated wiki page here
Q: Performance when running in Full-Window is terrible. But it's much faster in Windowed mode. What is going on?
A: This is due to SDL2's choice of back-ends. SDL2 prefers X11, even when Wayland is used (Raspberry PI OS Bookworm it is using Wayland by default). You can override this manually, by telling SDL2 to use a specific back-end, or change the order of priority it should use. Alternatively, you can switch to X11 instead of Wayland.
To change on the fly start Amiberry like this: SDL_VIDEODRIVER=wayland ./amiberry
You can make this change permanently by creating /etc/profile.d/sdl2_fix.sh with the following content:
export SDL_VIDEODRIVER=kmsdrm,wayland,x11
Log out and log back in, for the changes to take effect.
This will make SDL first try the kmsdrm backend, then wayland before falling back on x11.
A: The below is only an issue with older versions of Amiberry. Amiberry v5.x or newer already includes the correct mapping in the controllers file.
Starting with v4.x of Amiberry, we use SDL2's "gamecontrollerdb.txt" file for mappings of known controllers. It seems that the Competition Pro is re-using a gamepad USB ID, so it gets an incorrect mapping from that file. To fix the problem, you'll need to edit the file conf/gamecontrollerdb.txt with a text editor, and find the line starting with the following ID:
03000000790000001c18000011010000,PC Game Controller
Change that line with the following contents:
03000000790000001c18000011010000,Competition Pro Extra,a:b3,b:b1,back:b2,leftx:a0,lefty:a1,start:b0,platform:Linux,
Save the file and restart Amiberry. The mapping should now work properly for this joystick.
Q: Amiberry on a Pi4/Pi400 seems extraordinary slow. The Status Line shows it's only doing 30 FPS. What's wrong?
A: Is your connected monitor/TV a 4K one? If so, it may be forcing your Pi output to 4k@30Hz resolution. Amiberry uses VSync, so it will only show as many frames per second as the current refresh rate of your monitor. If that's set to 30, video and audio will be choppy and slower than expected.
Normally you can change the resolution in /boot/config.txt and force it to a 1080p one. However, some SmartTVs seem to ignore that and force a 4K resolution again... If that's the case with you, you could try forcing the configuration to 1080p in /boot/config.txt by using these additional options:
[hdmi:0]
hdmi_max_pixel_freq=200000000
[hdmi:1]
hdmi_max_pixel_freq=200000000
hdmi_ignore_edid=0xa5000080
Q: When I type some letters on the keyboard, I get unexpected behavior (e.g. typing x also adds Return). What's wrong?
A: Don't use the "Keyboard as Joystick" option in the Input panel. The CD32 mapping uses some extra keyboard keys that will interfere with normal keyboard typing.
A: Disable the Compositor to gain some more performance. On XCFE desktops for example, you can disable your compositor by opening the main Applications menu and clicking “Settings -> Window Manager Tweaks.” This will open a new window. Open the Compositor tab, and uncheck the option “Enable display compositing.”
A: Launching CD32 games does not require any default config, and you shouldn't use the A1200 config with it either (it won't enable the CD32 specific bits). If you have .cue/bin files, then the best way to launch them would be:
- From the command line: use the -autoload parameter. E.g. ./amiberry -autoload /home/pi/RetroPie/roms/amiga/Alien Breed - Tower Assault_CD32.cue (use escape characters where necessary, to handle spaces)
- From the GUI: Select CD32 from Quickstart, select the .CUE file in the CD slot, click on Start. CD32 images don't need or use WHDLoad. If you have WHDLoad installed CD32 games however, you can also launch them using the -autoload option, in the same way as shown above. Only the file passed would probably be an .lha one, not a CD image. Keep in mind that WHDLoad games usually don't contain CD audio tracks, so you'll be missing those...
Q: I have thousands of Config files in my installation, and Amiberry takes a long time to display the GUI.
A: The default behavior is to scan the list of config files, open each one and get the Description in order to populate the list in the GUI. If you have many such files, the process can take a longer time than desired. To bypass this behavior, you can make a change in the conf/amiberry.conf file:
- Open the file, and look for the line
read_config_descriptions. - Change the value of that line to
noand save the file again. - Restart the emulator for the changes to take effect.
A: Run the Whdload versions and Switch on “wait for blitter” and this should fix the speed issue on many games.
A: Please refer to the specific FAQ for this: WHDLoad Booter F.A.Q
Q: Audio is noticeable distorted when playing back with USB audio device instead of 3.5mm audio jack
A: Check if you're using a GPIO kernel module, which imposes some latency. Normally there shouldn't be any difference in audio latency from Amiberry, regardless if you're using the 3.5mm audio jack, HDMI-out, or a USB audio card.
A: Logging can be enabled from the GUI (Paths panel) or by changing a value in the conf/amiberry.conf file:
- Open the file, and look for the line
write_logfile. - Change the value of that line to
yesand save the file again. - Restart the emulator for the changes to take effect.
A new file named
amiberry_log.txtwill be created in the same location the emulator was started from. Additionally, the WHDLoad booter will also save log information in thewhdboot/save-data/Debugspath. Note: Make sure that the user running the emulator has permissions to create the file!
A: Yes, with v2.24 onwards a new feature was added, you can make a change in the conf/amiberry.conf file:
- Open the file, and look for the line
scanlines_by_default. - Change the value of that line to
yesand save the file again. - Restart the emulator for the changes to take effect. Note: Scanlines requires that Line Doubling is also enabled, which will cause a performance hit, since double the amount of lines will have to be drawn on-screen. Also, if your vertical resolution is not enough to display scanlines, this option will have no effect (it will revert back to no scanlines automatically).
A: Yes, you can use HDFs with RDB and multiple partitions, even if they were formatted using PFS. If you use a custom filesystem without RDB mode HDFs, just remember to place the Filesystem handler you're using (e.g. FastFileSystem or pfs3aio) in the kickstarts directory, along with your Kickstart ROMs. Then add your HDF as normal, and Amiberry will automaticall look for it there and attempt to mount the partitions during startup.
Q: When the emulator starts up, I get a few warning messages (MESA-LOADER: failed to retrieve device information) on the console. Is this a problem?
A: This is due to a known bug in libdrm (https://bugs.launchpad.net/raspbian/+bug/1656930). It's harmless and you can ignore it.
A: The binary is not broken, but Apple OS does not allow apps that don't come from a "recognized developer" to be run if you download it with a browser. You can whitelist the app manually, however. Open a console and run xattr -rd com.apple.quarantine Amiberry.app.
A: KMSDRM makes it possible to run Amiberry in console, without running X11 or Wayland. Keep in mind that this requires at least SDL2 2.0.18, which rules out anything older than Debian Bookworm (Raspberry PI OS Bookworm included).
A: In some cases you need to be a member of the input group.
A: On sway add this to your config file:
for_window [app_id="amiberry"] floating enable
for_window [title="Amiberry GUI"] focus
For Hyprland
windowrule = float, ^(amiberry*|Amiberry*)$
- First Installation
- RetroPie Installation
- Kickstart ROMs (BIOS)
- Compiling from source
- Frequently Asked Questions
- Default Options
- How to enable Integer Scaling