redream not working

[cmdima]

Hi there! I have retropie running on a pi4 and I used to play dreamcast games without issues with redream emulator. Last week I performed a system update and misteroiusly redream stopped working.

I unistalled it and installed it again but nothing happens. Everytime I try to load a rom with redream, the system takes me back to the rom list.

when I look in the runcommand log i get this:

Parameters:
Executing: /opt/retropie/emulators/redream/redream "/home/pi/RetroPie/roms/dreamcast/Mortal Kombat Gold.cdi"
dpkg-query: error in show format: may not be empty string
/opt/retropie/emulators/redream/redream: line 9: /opt/retropie/emulators/redream/redream.aarch64.elf: No such file or directory

any idea?

[mitu]

Please add some info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.

[aftermath17]

@cmdima Did you ever resolve this? I have the same problem right now with Redream. Strangely, it happens with PPSSPP too (although different error). I've tried to re-install both. Retroarch emulators work fine.

[sleve_mcdichael]

@aftermath17 what mitu said in redream not working still applies:

Please add some info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.

[c0un7z3r0]

I am suffering this too. Here are the details requested:

Pi Model or other hardware: (B, B+, 2 B, 3, X86 PC etc..)

Pi4b

Power Supply used: (If using a Pi)

Tried with Pi official and 3.5amp overpowered - same result

RetroPie Version Used (eg 3.6, 3.8.1, 4.1 - do not write latest):

4.8.4

Built From: (Pre made SD Image on RetroPie website, Berryboot, or on top of existing OS etc.. - please provide the filename of any image used)

Raspberry Pi Imager Stock Image

USB Devices connected:

1 PS controller adaptor, 1 Microsoft wireless mouse/keyboard dongle, 1 SSD running retropie (No SD Card - retropie is running off the SSD plugged in via USB)

Controller used:

1 ps2 dualshock

Error messages received:

dpkg-query: error in show format: may not be empty string
redream: line 9: ./redream.aarch64.elf: No such file or directory

Verbose log (if relevant):
Guide used: (Mention if you followed a guide)
File: (File with issue - with FULL path)
Emulator: (Name of emulator - if applicable)

Redream

Attachment of config files: (PLEASE USE PASTEBIN.COM FOR LARGE LOGS)
How to replicate the problem:

Install Retropie with Rpi Imager on to SSD
Install optional package redream
attempt to run redream (either via emulationstation or command line) and receive error as per above

My best guess would be that this appears to be a problem with a dependency, specifically dpkg-query. Doing some googling revealed this:

https://askubuntu.com/questions/1293709/weird-error-when-trying-to-install-packages-with-apt

but the file in the answer given is not present in retropie so im not sure how to proceed.

UPDATE: I did manage to find the file in that stack overflow answer but trying the solution provided there did not solve the issue.

[mitu]

@c0un7z3r0 said in redream not working:

My best guess would be that this appears to be a problem with a dependency, specifically dpkg-query. Doing some googling revealed this:

No, it's a problem with the redream launch script (/opt/retropie/emulators/redream/redream). It invokes dpkg-query with an empty argument. In the script:

MESA_DIST_VER=$(dpkg-query -f= --show libgl1-mesa-dri)

should be

MESA_DIST_VER=$(dpkg-query -f="\${Version}" --show libgl1-mesa-dri)

The script comes from upstream (@inolen), so we'll be reporting the issue there, hopefully an update will fix the issue.

[c0un7z3r0]

@mitu

That's fantastic, I found that file myself based on the error message (line 9) but was not sure what that should be changed to, to have valid syntax. The dpkg-query documentation wasn't much help without context as to what that particular line did. Thanks for the help, I'll manually update in the meantime and try it this evening.

Thanks again!

[mitu]

Try updating now redream, without modifying anything, and see if you still get the same error.

[c0un7z3r0]

@mitu @inolen

I updated which fixed the previous issue but brought about a new one:

dpkg: warning: version '""' has bad syntax: version number does not start with digit
redream: line 9: ./redream.aarch64.elf: No such file or directory

so presumably the ${Version} variable is not being set.

[windg]

Here Redream is working fine, i did a full update, RetroPie packages and system packages(underlying). Did you build RetroPie on top of Bullseye?

[c0un7z3r0]

@windg

No I ran the official raspberry pi imager software and wrote directly to an SSD so it's the stock image file

It's buster and if I do

Sudo apt-get update
Sudo apt-get upgrade

Then it says all packages are up to date

[c0un7z3r0]

@windg

the immediate problem is that the $Version variable in the

/Opt/RetroPie/emulators/redream/redream

Script is undefined so dpkg-query falls down when trying to set META_DIST_VER

[mitu]

@c0un7z3r0 said in redream not working:

[...]
so presumably the ${Version} variable is not being set.

Yes, there's still an issue. We'll spin the dreidel again. My original fix should still work.

[c0un7z3r0]

@mitu

Yes, there's still an issue. We'll spin the dreidel again. My original fix should still work.

What do you mean by the original fix? The suggestion above or the changes that were pushed to the latest build?

Please let me know if any further fixes get applied? (Also, if you can, let me know what repo these changes are happening in so I can track it?)

Thanks again for your help and persevering.

[mitu]

@c0un7z3r0 said in redream not working:

What do you mean by the original fix? The suggestion above or the changes that were pushed to the latest build?

I was referring to my first reply.

Please let me know if any further fixes get applied?

Try updating now.

(Also, if you can, let me know what repo these changes are happening in so I can track it?)

redream is not open source, so there's no public repository to track. You can watch the downloads page for new versions, but I don't think there's any detailed changelog for the development builds. I just reported the issue to @inolen and they have added some fixes to the RPI package.

[c0un7z3r0]

@mitu

Thanks again

This is getting weird, it now gives this error

Executing: /Opt/RetroPie/emulators/redream/redream "/home/pi/RetroPie/ROMs/Dreamcast/myromfile.chd"
/Opt/RetroPie/emulators/redream/redream: line 9: /Opt/RetroPie/emulators/redream/redream.aarch64.elf: No such file or directory 

But that file does exist.

Damn this is frustrating. Sorry to keep coming back with this, I appreciate your help

[mitu]

@c0un7z3r0 said in redream not working:

This is getting weird, it now gives this error

This seems to be something related to your system. /Opt/Retropie doesn't exist on a standard RetroPie installation, RetroPie is installed in /opt/retropie . Since Linux filesystems are generally case-sensitive, in this case the folders are not the same.

[c0un7z3r0]

@mitu sorry the capitalisation was mine. I manually typed it out on my phone

It is lowercase as you said.

[mitu]

Then I suggest you reinstall again redream. The package does contain the file not found in your error (/opt/retropie/emulators/redream/redream.aarch64.elf).

[c0un7z3r0]

@mitu

It does contain redream.aarch64.elf, it's referenced in the redream script we were having problems with. See image for my directory structure and files