Crash (SIGKILL/"Unrecognized Instruction" ) when opening the ROBLOX menu after 3-4 minutes of gameplay
bug
### Acknowledgement of checking existent issues
- [x] I have checked if my issue has already been reported, and I am certain that my problem has not already been addressed.
- [x] I have attached full logs, screenshots, and other relevant info, and understand that if I haven't, my issue will be closed and ignored.
- [ ] I agree that I just mindlessly checked every box without actually reading anything.
### What problem did you encounter?
**Overview**
Hello! This issue is more a report of my research and findings regarding the **menu crash** that occurs when you open the **ROBLOX menu**.
On `stable` and `build-repo 304626`, if you play a game and open the **ROBLOX menu** (either via `Esc` or clicking the menu button in the top left corner) after **roughly 3-4 minutes of gameplay**, the game will crash with a `SIGKILL/"Unrecognized Instruction"` error.
```
---------------------------------------------------------
FATAL: Unrecognized Instruction
---------------------------------------------------------
Received signal: 4 (Illegal Instruction)
Faulting RIP: 0x7fec8d339db7
Instruction Bytes: [f, b, bf, e, 0, 0, 0, be]
This program requires a CPU with x86-64-v2 features.
We attempted to emulate missing features, but encountered an instruction that could not be handled.
Printing CPU info:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 5 5600X 6-Core Processor
CPU Feature Support:
SSE3: Yes
SSSE3: Yes
SSE4.1: Yes
SSE4.2: Yes
POPCNT: Yes
AVX: Yes
While your CPU supports SSE 4.1, illegal instruction errors can also be thrown due to the program encountering something it didn't expect as a way to quickly stop itself. Check your configuration, verify file integrity, and try again. If nothing works, you should probably report this as a bug.
---------------------------------------------------------
```
This issue is related to other issues in the past that reported an `Unrecognized Instruction` similar to the one above, which have been marked as closed (#2351 and #2368).
I think that across these issues, two crashes appeared: the **menu crash** (which is discussed in this issue), and the **NVIDIA crash**; related to a bug in NVIDIA drivers (#2180 and #2327).
I believe that these two crashes can be confused with oneanother pretty easily, especially because they produce the same `Received signal` and `Instruction bytes`. A similar logic can also be applied to the **silent crash** considering that this crash seems to only occur when you open the ROBLOX menu **after 3-4 minutes**.
As a result, especially with all of these 3 crashes together; it can be easy to confuse these crashes with oneanother. I assume that by @V3L0C1T13S' [comment](https://github.com/vinegarhq/sober/issues/2351#issuecomment-5040719143) in #2351 and her [comment](https://github.com/vinegarhq/sober/issues/2208#issuecomment-5040776768) in #2208 the **silent crash** and **NVIDIA crash** have been addressed. I was able to confirm that the silent crash is fixed; unsure about the NVIDIA crash, though, as I did not test it.
**Testing**
The main finding here is that on the test build (build-repo 304626), the silent crash is fixed, but the menu crash still persists.
I've ran 5 "tests" (which is just me pressing either Esc/Tab every 30 seconds on an empty baseplate) to get logs and crash dumps + perform A/B testing to ensure that the **menu crash** aren't because of the following:
1. **Not the Flatpak build:**
The menu crash is not caused by the **silent crash** caused by the current Flatpak build (#2208 and #2332).
Test 1 and 2 uses the `stable` Flatpak build to showcase that the **menu crash** and **silent crash** occur on those builds. However, Test 3, 4, 5 use the test build `(build-repo 304626`) to ensure that it is not because of the **silent crash**, and to also show that the **menu crash** persists on this build as well.
2. **Not the game:**
I was able to replicate the **menu crash** in **any game**, but to really make sure that it wasn't because of the game; all of my testing took place in an [empty baseplate](https://www.roblox.com/games/95206881/Baseplate).
As a quick note, there are a lot of cheaters that do play these, so you may see some _interesting things_ if you do watch the test videos.
3. **Not the NVIDIA crash:**
Throughout all of my tests, my GPU, the **AMD Radeon RX 7600** is used. More information about my specifications can be seen below.
As a result, I would not run into the **NVIDIA crash** (#2180 and #2327) and so, it is unrelated to the **menu crash**.
This is discussed below in the environment, but I do also have a **NVIDIA GT 103**0 that I personally use to ensure that my secondary monitor works when using GPU passthrough. However, I ensured that the GT 1030 was disabled during testing, and you can see by `vulkaninfo` below that it is not in use.
4. **Only the menu, and no other instances of CoreGui:**
The **menu crash** does not occur if you open the chat or the player menu. It only occurs if you open the **ROBLOX menu**. I have not observed the **menu crash** when doing anything else, but if anyone is able to produce the same crash when doing something else, please feel free to comment.
**Environment**
`fastfetch`
```
.-------------------------: bacon@bounce
.+=========================. ------------
:++===++==================- :++- OS: CachyOS x86_64
:*++====+++++=============- .==: Host: MS-7C02 (1.0)
-*+++=====+***++==========: Kernel: Linux 7.1.5-1-cachyos
=*++++========------------: Uptime: 4 hours, 40 mins
=*+++++=====- ... Packages: 26 (flatpak), 1859 (pacman)
.+*+++++=-===: .=+++=: Shell: bash 5.3.15
:++++=====-==: -*****+ Display (VG27AQM5A): 2560x1440 in 27", 240 Hz [External] *
:++========-=. .=+**+. Display (DELL P2419H): 1920x1080 in 24", 60 Hz [External]
.+==========-. . DE: KDE Plasma 6.7.3
:+++++++====- .--==-. WM: KWin (Wayland)
:++==========. :+++++++: WM Theme: Breeze
.-===========. =*****+*+ Theme: Darkly (MaterialYouDark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3]
.-===========: .+*****+: Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
-=======++++:::::::::::::::::::::::::-: .---: Font: Google Sans Flex (11pt, Medium) [Qt], Google Sans Flex Medium (11pt) [GTK2/3/4]
:======++++====+++******************=. Cursor: capitaine (24px)
:=====+++==========++++++++++++++*- Terminal: kitty 0.48.1
.====++==============++++++++++*- Terminal Font: JetBrainsMonoNF-Regular (11pt)
.===+==================+++++++: CPU: AMD Ryzen 5 5600X (12) @ 4.65 GHz
.-=======================+++: GPU 1: NVIDIA GeForce GT 1030 [Discrete]
.......................... GPU 2: AMD Radeon RX 7600 [Discrete]
Memory: 7.71 GiB / 31.26 GiB (25%)
Swap: 2.44 MiB / 31.26 GiB (0%)
Disk (/): 154.10 GiB / 234.46 GiB (66%) - btrfs
Disk (/mnt/games): 189.80 GiB / 675.51 GiB (28%) - btrfs
Local IP (enp34s0): 10.0.0.92/24
Locale: en_US.UTF-8
```
`vulkaninfo --summary
`
```
==========
VULKANINFO
==========
Vulkan Instance Version: 1.4.350
Instance Extensions: count = 27
-------------------------------
VK_EXT_acquire_drm_display : extension revision 1
VK_EXT_acquire_xlib_display : extension revision 1
VK_EXT_debug_report : extension revision 10
VK_EXT_debug_utils : extension revision 2
VK_EXT_direct_mode_display : extension revision 1
VK_EXT_display_surface_counter : extension revision 1
VK_EXT_headless_surface : extension revision 1
VK_EXT_layer_settings : extension revision 2
VK_EXT_surface_maintenance1 : extension revision 1
VK_EXT_swapchain_colorspace : extension revision 5
VK_KHR_device_group_creation : extension revision 1
VK_KHR_display : extension revision 23
VK_KHR_external_fence_capabilities : extension revision 1
VK_KHR_external_memory_capabilities : extension revision 1
VK_KHR_external_semaphore_capabilities : extension revision 1
VK_KHR_get_display_properties2 : extension revision 1
VK_KHR_get_physical_device_properties2 : extension revision 2
VK_KHR_get_surface_capabilities2 : extension revision 1
VK_KHR_portability_enumeration : extension revision 1
VK_KHR_surface : extension revision 25
VK_KHR_surface_maintenance1 : extension revision 1
VK_KHR_surface_protected_capabilities : extension revision 1
VK_KHR_wayland_surface : extension revision 6
VK_KHR_xcb_surface : extension revision 6
VK_KHR_xlib_surface : extension revision 6
VK_LUNARG_direct_driver_loading : extension revision 1
VK_NV_display_stereo : extension revision 1
Instance Layers: count = 11
---------------------------
VK_LAYER_FROG_gamescope_wsi_x86_64 Gamescope WSI (XWayland Bypass) Layer (x86_64) 1.3.221 version 1
VK_LAYER_MANGOHUD_overlay_x86 Vulkan Hud Overlay 1.3.0 version 1
VK_LAYER_MANGOHUD_overlay_x86_64 Vulkan Hud Overlay 1.3.0 version 1
VK_LAYER_MESA_anti_lag Open-source implementation of the VK_AMD_anti_lag extension. 1.4.303 version 1
VK_LAYER_MESA_device_select Linux device selection layer 1.4.303 version 1
VK_LAYER_NV_optimus NVIDIA Optimus layer 1.4.312 version 1
VK_LAYER_NV_present NVIDIA GR2608 layer 1.4.312 version 1
VK_LAYER_VALVE_steam_fossilize_32 Steam Pipeline Caching Layer 1.3.207 version 1
VK_LAYER_VALVE_steam_fossilize_64 Steam Pipeline Caching Layer 1.3.207 version 1
VK_LAYER_VALVE_steam_overlay_32 Steam Overlay Layer 1.3.207 version 1
VK_LAYER_VALVE_steam_overlay_64 Steam Overlay Layer 1.3.207 version 1
Devices:
========
GPU0:
apiVersion = 1.4.354
driverVersion = 26.1.5
vendorID = 0x1002
deviceID = 0x7480
deviceType = PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
deviceName = AMD Radeon RX 7600 (RADV NAVI33)
driverID = DRIVER_ID_MESA_RADV
driverName = radv
driverInfo = Mesa 26.1.5-arch3.1
conformanceVersion = 1.4.0.0
deviceUUID = 00000000-2800-0000-0000-000000000000
driverUUID = 414d442d-4d45-5341-2d44-525600000000
```
`flatpak list`
```
Name Application ID Version Branch Installation
Bottles com.usebottles.bottles 64.1 stable system
Buzz io.github.chidiwilliams.Buzz 1.4.4 stable system
Gear Lever it.mijorus.gearlever 4.6.2 stable system
i386 org.freedesktop.Platform.Compat.i386 25.08 system
Mesa org.freedesktop.Platform.GL.default 26.0.6 24.08 system
Mesa (Extra) org.freedesktop.Platform.GL.default 26.0.6 24.08extra system
Mesa org.freedesktop.Platform.GL.default 26.1.4 25.08 system
Mesa (Extra) org.freedesktop.Platform.GL.default 26.1.4 25.08-extra system
nvidia-580-173-02 org.freedesktop.Platform.GL.nvidia-580-173-02 1.4 system
Mesa org.freedesktop.Platform.GL32.default 26.1.4 25.08 system
Mesa (Extra) org.freedesktop.Platform.GL32.default 26.1.4 25.08-extra system
nvidia-580-173-02 org.freedesktop.Platform.GL32.nvidia-580-173-02 1.4 system
Nvidia VAAPI driver org.freedesktop.Platform.VAAPI.nvidia 25.08 system
Codecs Extra Extension org.freedesktop.Platform.codecs-extra 25.08-extra system
i386 org.freedesktop.Platform.codecs_extra.i386 25.08-extra system
openh264 org.freedesktop.Platform.openh264 2.5.1 2.5.1 system
GNOME Application Platform version 49 org.gnome.Platform 49 system
GNOME Application Platform version 50 org.gnome.Platform 50 system
GNOME Software Development Kit version 50 org.gnome.Sdk 50 system
Breeze GTK theme org.gtk.Gtk3theme.Breeze 6.7.2 3.22 system
Adwaita theme org.kde.KStyle.Adwaita 6.9 system
KDE Application Platform org.kde.Platform 6.9 system
Sober org.vinegarhq.Sober 1.7.1 stable system
Vinegar org.vinegarhq.Vinegar 1.9.4 stable system
gecko org.winehq.Wine.gecko stable-25.08 system
mono org.winehq.Wine.mono stable-25.08 system
```
**Tests**
During my tests, I tried to use `dmesg`, `journalctl`, and `coredump`, but I was unable to get any results :( However, I've shared my logs and my crash dumps, except for the last two tests (Test 4 and Test 5), where I was unfortunately unable to get any crash dumps for some reason. Apologies for that.
`build-repo 304626` (the dev build) can be installed via:
`flatpak install https://dl.flathub.org/build-repo/304626/org.vinegarhq.Sober.flatpakref`
Do notice that because of #2375, you will need to install `Roblox 2.7.3.0` for the build. You can download it from [APKMirror](https://www.apkmirror.com/apk/roblox-corporation/roblox/roblox-2-730-790-release/roblox-2-730-790-android-apk-download/download/?key=2e1a674940d8c0d8b72a8c15ccf37bb7ee9bf579).
For crash dumps, I've appended `.txt` to the end of the crash dumps so that they can be attached on GitHub.
Keyboard input is shown in the bottom left corner with `showmethekey` to display when I perform actions.
To ensure that everything was clean, after each test, I reinstalled Sober using:
`flatpak uninstall --delete-data org.vinegarhq.Sober`
For future reference if you're looking to report similar issues:
Logs can be found at `~/.var/app/org.vinegarhq.Sober/data/sober/sober_logs/`
Crashes can be found at `~/.var/app/org.vinegarhq.Sober/data/sober/crashes/`
I also had to compress my videos down quite a lot in order to meet GitHub's <10 MB limit for attaching files, so sorry if the videos are super poor quality :(
**Test 1**
Procedure: `stable` build, press `Esc` every 30 seconds to open the **ROBLOX menu**.
Results: At `3:30`, the **menu crash** occurs, causing the `SIGKILL/Unexpected Instruction`.
Conclusion: The **menu crash** can be reproduced on the `stable` build.
https://github.com/user-attachments/assets/89acd04f-ac8c-45ac-8287-63311227ea33
[test1_2026-07-28_15-56-07.log](https://github.com/user-attachments/files/30488873/test1_2026-07-28_15-56-07.log)
[test1_2026-07-28 20:14:41.419847545 UTC.txt](https://github.com/user-attachments/files/30488925/test1_2026-07-28.20.14.41.419847545.UTC.txt)
```
---------------------------------------------------------
FATAL: Unrecognized Instruction
---------------------------------------------------------
Received signal: 4 (Illegal Instruction)
Faulting RIP: 0x7fec8d339db7
Instruction Bytes: [f, b, bf, e, 0, 0, 0, be]
This program requires a CPU with x86-64-v2 features.
We attempted to emulate missing features, but encountered an instruction that could not be handled.
Printing CPU info:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 5 5600X 6-Core Processor
CPU Feature Support:
SSE3: Yes
SSSE3: Yes
SSE4.1: Yes
SSE4.2: Yes
POPCNT: Yes
AVX: Yes
While your CPU supports SSE 4.1, illegal instruction errors can also be thrown due to the program encountering something it didn't expect as a way to quickly stop itself. Check your configuration, verify file integrity, and try again. If nothing works, you should probably report this as a bug.
---------------------------------------------------------
```
**Test 2**
Procedure: `stable` build, press `Tab` every 30 seconds to open the **player menu**.
Results: At `3:56`, the **silent crash** occurs, which is expected for this build. Since the **menu crash** did not occur with the player menu, we can infer that the crash only occurs with the **ROBLOX menu**.
Conclusion: The **silent crash** persists on the `stable` build (which is expected) and the **menu crash** only occurs with the **ROBLOX menu**.
https://github.com/user-attachments/assets/79928325-01a6-4fca-9c19-c182629c0953
[test2_2026-07-28_16-10-51.log](https://github.com/user-attachments/files/30489048/test2_2026-07-28_16-10-51.log)
No **crash dump**, as the **silent crash** does not produce one.
**Test 3**
Procedure: `build-repo 304626` build, press `Esc` every 30 seconds to open the **ROBLOX menu**.
Results: At `4:00`, the **menu crash** occurs, causing the `SIGKILL/Unexpected Instruction`.
Conclusion: The **menu crash** can be reproduced and still persists on the `build-repo 304626` build.
https://github.com/user-attachments/assets/4410040b-a2f3-4f46-b792-0284fc51aed2
[test3_2026-07-28_16-26-03.log](https://github.com/user-attachments/files/30489225/test3_2026-07-28_16-26-03.log)
[test3_2026-07-28 20:24:34.641716594 UTC.txt](https://github.com/user-attachments/files/30489228/test3_2026-07-28.20.24.34.641716594.UTC.txt)
```
---------------------------------------------------------
FATAL: Unrecognized Instruction
---------------------------------------------------------
Received signal: 4 (Illegal Instruction)
Faulting RIP: 0x7f8cdb3f6ca9
Instruction Bytes: [f, b, bf, e, 0, 0, 0, be]
This program requires a CPU with x86-64-v2 features.
We attempted to emulate missing features, but encountered an instruction that could not be handled.
Printing CPU info:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 5 5600X 6-Core Processor
CPU Feature Support:
SSE3: Yes
SSSE3: Yes
SSE4.1: Yes
SSE4.2: Yes
POPCNT: Yes
AVX: Yes
While your CPU supports SSE 4.1, illegal instruction errors can also be thrown due to the program encountering something it didn't expect as a way to quickly stop itself. Check your configuration, verify file integrity, and try again. If nothing works, you should probably report this as a bug.
---------------------------------------------------------
```
**Test 4**
Procedure: `build-repo 304626` build, press `Tab` every 30 seconds to open the **player menu**.
Results: No **silent crash** occurs, proving that the dev build fixed the **silent crash** and that it is unrelated to the **menu crash**. I purposefully cause the **menu crash** at `7:00` to prove that it still persists.
Conclusion: The **silent crash** is fixed and is unrelated to the **menu crash**.
https://github.com/user-attachments/assets/871573ea-7dc6-4fc2-8f0e-ea38beb4615e
[test4_2026-07-28_16-50-17.log](https://github.com/user-attachments/files/30489316/test4_2026-07-28_16-50-17.log)
Weirdly enough, I never got a **crash dump** for this. Sorry for the inconvenience.
```
---------------------------------------------------------
FATAL: Unrecognized Instruction
---------------------------------------------------------
Received signal: 4 (Illegal Instruction)
Faulting RIP: 0x7f1cf214cca9
Instruction Bytes: [f, b, bf, e, 0, 0, 0, be]
This program requires a CPU with x86-64-v2 features.
We attempted to emulate missing features, but encountered an instruction that could not be handled.
Printing CPU info:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 5 5600X 6-Core Processor
CPU Feature Support:
SSE3: Yes
SSSE3: Yes
SSE4.1: Yes
SSE4.2: Yes
POPCNT: Yes
AVX: Yes
While your CPU supports SSE 4.1, illegal instruction errors can also be thrown due to the program encountering something it didn't expect as a way to quickly stop itself. Check your configuration, verify file integrity, and try again. If nothing works, you should probably report this as a bug.
---------------------------------------------------------
```
**Test 5**
Procedure: Same as **Test 3**, but this time on OpenGL. On the `build-repo 304626` build, press `Esc` every 30 seconds to open the **ROBLOX menu**
Results: At `4:00`, the **menu crash** occurs, causing the `SIGKILL/Unexpected Instruction`.
Conclusion: The **menu crash** can be reproduced on the `build-repo 304626` build, regardless of whether or not the renderer is **Vulkan** or **OpenGL**.
https://github.com/user-attachments/assets/75f7db06-c185-4972-8762-481a9f2d7827
[test5_2026-07-28_19-36-05.log](https://github.com/user-attachments/files/30489352/test5_2026-07-28_19-36-05.log)
Again, I unfortunately did not get a **crash dump** for this. I'm not sure why. Sorry about that.
```
---------------------------------------------------------
FATAL: Unrecognized Instruction
---------------------------------------------------------
Received signal: 4 (Illegal Instruction)
Faulting RIP: 0x7f8c3e56cca9
Instruction Bytes: [f, b, bf, e, 0, 0, 0, be]
This program requires a CPU with x86-64-v2 features.
We attempted to emulate missing features, but encountered an instruction that could not be handled.
Printing CPU info:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 5 5600X 6-Core Processor
CPU Feature Support:
SSE3: Yes
SSSE3: Yes
SSE4.1: Yes
SSE4.2: Yes
POPCNT: Yes
AVX: Yes
While your CPU supports SSE 4.1, illegal instruction errors can also be thrown due to the program encountering something it didn't expect as a way to quickly stop itself. Check your configuration, verify file integrity, and try again. If nothing works, you should probably report this as a bug.
---------------------------------------------------------
```
**Comments**
Since I wasn't able to trace anything, I unfortunately don't really know of a clear cause.
- I can't produce a backtrace as none of my debugging tools produce anything (I assume due to how Flatpak is sandboxed).
- It doesn't seem to be related to graphics drivers, unless there's something terribly wrong with my setup.
- And, there seems to no relation to the other crashes that have been reported so far, except for the fact that it seems to occur after 3-4 minutes, which suggests that it occurs around the **autosave interval**.
- It might be related to `[DFLog::TextChatFiltering] The Chat Enable Button is shown` as that can be seen before every crash; but I highly doubt that.
Other than that, I would like to say: thank you to VinegarHQ for creating **Sober** and **Vinegar**. Especially considering **Hyperion**, it is incredible the work that you folks have done here. If this was open-source, I'm sure that there would be plenty lot of developers who are willing to contribute, but I understand fully why this project needs to remain closed-source.
**Much love ❤️**
If anyone else is able to reproduce the **menu crash**, please feel free to share your **log** and **crash dump** here, as well as your specifications/environment. More information would be delightful to solve this issue.
**tl;dr:** On `stable` or `build-repo 304626`, if you play for 3-4 minutes and open the **ROBLOX menu**, ROBLOX will crash with a `SIGKILL/"Unrecognized Instruction"` error. **Menu crash** appears to be unrelated to the **silent crash**, the **NVIDIA crash**, and can be reproduced on all games.
### Roblox Experience link
https://www.roblox.com/games/95206881/Baseplate
关闭于 14 天前 4 条评论