My AMD RX 580 2048sp (a card that was previously used in a windows machine without flaws) has a few quirks in my Kubuntu 26.04 LTS machine.
Firstly, it over heats easily, which was addressed but not fixed by having better coolers, slightly limiting power usage and having fan speed configured to spin fast at the slightest heat.
Secondly, the main problem: sometimes, under specific environments and conditions, the system crashes. Image will turn into one solid shade, audio will glitch and the system won't work until rebooting. I have no idea what causes this, as it isn't related to temperature or heavy proceeding loads, as it can run graphically demanding games for hours. My guess is that there is one specific visual FX that the GPU can't process and then crashes. My reasoning is founded in 2 examples; in an emulator I have, most shaders run fine, but some crash consistently; and in one game the system crashes in the same exact spot but never anywhere else.
I have tried installing the amdgpu drivers, but that has done nothing and updating the system over months hasn't done anything, and unsinstalling said amdgpu packages has also made no difference. One thing that is important to not is that the prior GPU in this same distro didn't crash.
Edit: I have tried replicating the crash by installing a game that consistently crashes at the same spot. It crashes, I marked the time it did, waited 10 minutes (to make sure the logs are readable as being form different times), and this is the syslog from when the game opened and when it crashed:
2026-06-02T17:21:27.431856-03:00 EmperorPenguin steam[10260]: [2026-06-02 17:21:27] Saving metrics to disk (/home/cdanlb/.steam/debian-installation/package/steam_client_metrics.bin)
2026-06-02T17:22:59.562805-03:00 EmperorPenguin steam[10260]: [2026-06-02 17:22:59] uninstalled manifest found in /home/cdanlb/.steam/debian-installation/package/steam_client_ubuntu12 (1).
2026-06-02T17:23:56.417529-03:00 EmperorPenguin steam[10260]: chdir "/home/cdanlb/.steam/debian-installation/steamapps/common/Ardenfall Demo"
2026-06-02T17:23:56.425315-03:00 EmperorPenguin steam[10260]: ERROR: ld.so: object '/home/cdanlb/.steam/debian-installation/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
2026-06-02T17:23:56.446436-03:00 EmperorPenguin steam[10260]: ERROR: ld.so: object '/home/cdanlb/.steam/debian-installation/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
2026-06-02T17:23:56.460727-03:00 EmperorPenguin steam[10260]: Game Recording - would start recording game 1837770, but recording for this game is disabled
2026-06-02T17:23:56.461357-03:00 EmperorPenguin steam[10260]: Adding process 12471 for gameID 1837770
2026-06-02T17:23:56.464043-03:00 EmperorPenguin steam[10260]: ERROR: ld.so: object '/home/cdanlb/.steam/debian-installation/ubuntu12_64/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
2026-06-02T17:23:56.470215-03:00 EmperorPenguin steam[10260]: ERROR: ld.so: object '/home/cdanlb/.steam/debian-installation/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
2026-06-02T17:23:56.486306-03:00 EmperorPenguin steam[10260]: ERROR: ld.so: object '/home/cdanlb/.steam/debian-installation/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
2026-06-02T17:23:56.527906-03:00 EmperorPenguin steam[10260]: Adding process 12472 for gameID 1837770
2026-06-02T17:23:56.580033-03:00 EmperorPenguin steam[10260]: Adding process 12473 for gameID 1837770
2026-06-02T17:23:56.601262-03:00 EmperorPenguin steam[10260]: Adding process 12474 for gameID 1837770
2026-06-02T17:23:57.496060-03:00 EmperorPenguin steam[10260]: Adding process 12563 for gameID 1837770
2026-06-02T17:23:58.721421-03:00 EmperorPenguin steam[10260]: ProtonFixes[12563] INFO: Running protonfixes on "GE-Proton10-26", build at 2025-12-07 22:33:15+00:00.
2026-06-02T17:23:58.721502-03:00 EmperorPenguin steam[10260]: ProtonFixes[12563] INFO: Running checks
2026-06-02T17:23:58.721553-03:00 EmperorPenguin steam[10260]: ProtonFixes[12563] INFO: All checks successful
2026-06-02T17:23:58.723375-03:00 EmperorPenguin steam[10260]: ProtonFixes[12563] INFO: Using global defaults for "Ardenfall Demo" (1837770)
2026-06-02T17:23:58.723503-03:00 EmperorPenguin steam[10260]: ProtonFixes[12563] INFO: No global protonfix found for "Ardenfall Demo" (1837770)
2026-06-02T17:23:58.788766-03:00 EmperorPenguin steam[10260]: fsync: up and running.
2026-06-02T17:23:58.805139-03:00 EmperorPenguin steam[10260]: Adding process 12564 for gameID 1837770
2026-06-02T17:23:58.805706-03:00 EmperorPenguin steam[10260]: Adding process 12565 for gameID 1837770
2026-06-02T17:23:58.856666-03:00 EmperorPenguin steam[10260]: Adding process 12566 for gameID 1837770
2026-06-02T17:23:58.908007-03:00 EmperorPenguin steam[10260]: Adding process 12569 for gameID 1837770
2026-06-02T17:23:58.908665-03:00 EmperorPenguin steam[10260]: Adding process 12571 for gameID 1837770
2026-06-02T17:23:58.959760-03:00 EmperorPenguin steam[10260]: Adding process 12574 for gameID 1837770
2026-06-02T17:23:59.011128-03:00 EmperorPenguin steam[10260]: Adding process 12583 for gameID 1837770
2026-06-02T17:23:59.062379-03:00 EmperorPenguin steam[10260]: Adding process 12588 for gameID 1837770
2026-06-02T17:23:59.769769-03:00 EmperorPenguin steam[10260]: Adding process 12599 for gameID 1837770
2026-06-02T17:24:00.323858-03:00 EmperorPenguin steam[10260]: Adding process 12622 for gameID 1837770
2026-06-02T17:24:00.533211-03:00 EmperorPenguin steam[10260]: Adding process 12641 for gameID 1837770
2026-06-02T17:24:00.745408-03:00 EmperorPenguin steam[10260]: Adding process 12651 for gameID 1837770
2026-06-02T17:24:00.835748-03:00 EmperorPenguin steam[10260]: Fossilize INFO: Overriding serialization path: "/home/cdanlb/.steam/debian-installation/steamapps/shadercache/1837770/fozpipelinesv6/steamapprun_pipeline_cache".
2026-06-02T17:24:01.020145-03:00 EmperorPenguin kded6[1857]: Registering ":1.255/StatusNotifierItem" to system tray
2026-06-02T17:24:01.057251-03:00 EmperorPenguin kded6[1857]: Service ":1.255" unregistered
2026-06-02T17:24:01.075966-03:00 EmperorPenguin kded6[1857]: Registering ":1.256/StatusNotifierItem" to system tray
2026-06-02T17:24:01.077626-03:00 EmperorPenguin kded6[1857]: Service ":1.256" unregistered
2026-06-02T17:24:01.081164-03:00 EmperorPenguin kded6[1857]: Registering ":1.257/StatusNotifierItem" to system tray
2026-06-02T17:24:01.107321-03:00 EmperorPenguin kded6[1857]: Service ":1.257" unregistered
2026-06-02T17:24:02.336885-03:00 EmperorPenguin steam[10260]: 06/02 17:24:02 minidumps folder is set to /tmp/dumps
2026-06-02T17:24:02.336961-03:00 EmperorPenguin steam[10260]: 06/02 17:24:02 Init: Installing breakpad exception handler for appid(gameoverlayui)/version(20260527212129)/tid(12793)
2026-06-02T17:24:02.337010-03:00 EmperorPenguin steam[10260]: 06/02 17:24:02 Init: Installing breakpad exception handler for appid(gameoverlayui)/version(1.0)/tid(12793)