Pressing the Japanese Yen key (while in a party) instantly crashes Steam, and causes Deadlock to hang.

[officialnochill]

I can share the crashdumps to the devs.

Bug is as the title describes, and crucially, only works when you are in a party.
Certain Japanese keyboards have a dedicated "Yen" button

The bug appears to be very similar to the bug so it might just be that unrecognized inputs cause the issue.

A

Thread 'Right alt/AltGR hard lock + steam crash (linux)'

Oct 11, 2025

I am on linux wayland (swaywm, so might be running through xwayland), running deadlock on proton experimental, using the french AZERTY keymap.

In multiplayer lobbies (pvp matches and party hideout, could not reproduce in a bot lobby or private hideout), pressing the right alt (AltGR, using xev it gets reported as IOS_Level3_Shift, keysym 0xfe03, keycode 108), instantly soft locks the game, with a frozen video output and the audio still playing.
It also makes steam hard crash at the same time, likely related.
When pressing the key in a context that doesn't cause a crash, nothing appears in...

• Axy~
• Replies: 1
• Forum: Bug Reports

• 

and this:

A

Thread 'Hyper_L key crashes Deadlock and Steam while in party'

Nov 12, 2024

Hardware specs:​

OS: Arch Linux x86_64
Kernel: 6.11.6-arch1-1
WM: sway
DE: N/A (Running only sway)
CPU: Intel i5-3570K (4) @ 3.800GHz
GPU: AMD ATI Radeon RX 6600 XT
Memory: 23988MiB
Tested with DX11 and Vulkan
Tested with Proton-GE-18, GE-20, Proton Experimental and Proton 9.0-3

Bug description:​

When pressing any key bound to hyper_L while in a party, Deadlock and Steam both instantly crash. This is regardless of whether loaded into a game, or in the main menu lobby.

Pressing any key bound to hyper_L while not in a party does not crash, and...

• aj.theistic
• Replies: 1
• Forum: Bug Reports

• 

and this:

L

Thread 'System freeze after using custom game party chat'

Jan 13, 2025

As title says, i got memory leak i guess gdb backtrace and journal logs attached

GDB

#0  0xee6b0579 in __kernel_vsyscall ()
[Current thread is 1 (Thread 0xdadffb40 (LWP 3735))]
(gdb) bt
#0  0xee6b0579 in __kernel_vsyscall ()
#1  0xee2e69bf in __pthread_kill_implementation (threadid=threadid@entry=3672111936, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:43
#2  0xee2e6a4f in __pthread_kill_internal (threadid=3672111936, signo=6) at pthread_kill.c:78
#3  0xee28b7b7 in __GI_raise (sig=6) at ../sysdeps/posix/raise.c:26
#4  0xee272121 in __GI_abort () at abort.c:79
#5...

• ljon4ik97
• Replies: 2
• Forum: Bug Reports

• 

[ 16: wl_keyboard] key: serial: 71064; time: 33617655; key: 132; state: 1 (pressed) sym: NoSymbol (0), utf8: ''[ 16: wl_keyboard] key: serial: 71065; time: 33618276; key: 132; state: 0 (released)

This is what the key is recognized as by the system.

10/29 01:22:35 Init: Installing breakpad exception handler for appid(gameoverlayui)/version(1.0)/tid(65470)src/clientdll/interfacemap_client.h (5574) : Assertion Failed: Fencepost deserialize mismatch in IClientNetworkingSocketsSerialized::SendP2PRendezvoussrc/clientdll/interfacemap_client.h (5574) : Assertion Failed: Fencepost deserialize mismatch in IClientNetworkingSocketsSerialized::SendP2PRendezvousassert_20251029012559_38.dmp[65744]: Uploading dump (out-of-process)/tmp/dumps/assert_20251029012559_38.dmpterminate called after throwing an instance of 'std::length_error' what(): basic_string::_S_createcrash_20251029012559_39.dmp[65748]: Uploading dump (out-of-process)/tmp/dumps/crash_20251029012559_39.dmp/home/nochill/.local/share/Steam/steam.sh: line 928: 61531 Aborted (core dumped) "$STEAMROOT/$STEAMEXEPATH" "$@"

The above is what Steams hard crash reports in the terminal

the std::length_error certainly makes it seem input related

The key is right next to backspace so its rather easy to accidentally hit.

 

[9tholapzm]

I'm on Linux and I have the same issue but with the tilde button (~ or `) while in party. It's right next to number 1 button so it's easy to hit, I also tried to unbind it just in case, didn't help (unbind `, unbind ~ in console). It instantly freezes both deadlock and steam, but again it happens only when in party (both in-game and in hideout).
Both on DX11 and Vulkan


Specs:

OS: CachyOS x86_64
Kernel: Linux 6.17.5-2-cachyos
DE: KDE Plasma 6.5.1
WM: KWin (Wayland)
CPU: AMD Ryzen 9 5950X (32) @ 5.09 GHz
GPU: AMD Radeon RX 6800 XT