Your system information

• Steam client version (build number or date): steam_client_ubuntu12 version 1782866176 + steam launcher 1:1.0.0.85
• Distribution: Debian Forky (Running sway/wayland)
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: steam-logs.tar.gz
• GPU: [AMD/ATI] Navi 44 [Radeon RX 9060 XT]

Please describe your issue in as much detail as possible:

Steam fails to start. When launched via app launcher there is no feedback. When launched in terminal via steam command it crashes after checking for updates. I first noticed this issue yesterday June 30th.

[----] Verifying installation...
[2026-07-01 09:01:14] Show window
[2026-07-01 09:01:15] Verification complete
UpdateUI: skip show logo
[2026-07-01 09:01:15] Destroy window

Steam logging initialized: directory: /home/sam/.steam/debian-installation/logs

[2026-07-01 09:01:15] ProcessNextMessage: socket disconnected
[2026-07-01 09:01:15] No more messages are expected - exiting
Unable to open display
Unable to open displaycrash_20260701090115_5.dmp[3963]: Uploading dump (out-of-process)
/tmp/dumps/crash_20260701090115_5.dmp
/home/sam/.steam/debian-installation/steam.sh: line 966:  3945 Segmentation fault         "$STEAMROOT/$STEAMEXEPATH" "$@"
[Wed Jul 01 09:01 AM] sam@pc:~$ crash_20260701090115_5.dmp[3963]: Finished uploading minidump (out-of-process): success = yes
crash_20260701090115_5.dmp[3963]: response: CrashID=bp-fe9c8027-acf4-4a7c-8e49-ba2112260701
crash_20260701090115_5.dmp[3963]: file ''/tmp/dumps/crash_20260701090115_5.dmp'', upload yes: ''CrashID=bp-fe9c8027-acf4-4a7c-8e49-ba2112260701''

Running with debugger attached reveals a crash in XQueryExtension (https://gist.github.com/samwcoulter/6c547bde6e5eb29cef58bd052302085f)

[----] Verifying installation...
[2026-07-01 09:02:49] Verification complete
UpdateUI: skip show logo
[2026-07-01 09:02:49] Destroy window

Steam logging initialized: directory: /home/sam/.steam/debian-installation/logs

[New Thread 0xefd7db40 (LWP 5836)]
[2026-07-01 09:03:00] ProcessNextMessage: socket disconnected
[2026-07-01 09:03:00] No more messages are expected - exiting
Unable to open display
Unable to open display
Thread 1 "steam" received signal SIGSEGV, Segmentation fault.
Download failed: Invalid argument.  Continuing without source file ./build/src/../../src/QuExt.c.
XQueryExtension (dpy=0x0, name=0xf05520b4 "GLX", major_opcode=0xffff5cb0, first_event=0xffff5cb4, first_error=0xffff5cb8) at ../../src/QuExt.c:48
⚠️ warning: 48	../../src/QuExt.c: No such file or directory
(gdb) info locals
rep = {type = 216 '\330', pad1 = 142 '\216', sequenceNumber = 61527, length = 4032659320, present = 224 '\340', major_opcode = 192 '\300', first_event = 93 ']', first_error = 240 '\360', pad3 = 4032270229, pad4 = 4032267431, 
  pad5 = 4032659496, pad6 = 0, pad7 = 0}
req = <optimized out>
(gdb) bt
#0  XQueryExtension (dpy=0x0, name=0xf05520b4 "GLX", major_opcode=0xffff5cb0, first_event=0xffff5cb4, first_error=0xffff5cb8) at ../../src/QuExt.c:48
#1  0xf05297e2 in glXQueryExtension (dpy=0x0, error_base=0x0, event_base=0x0) at ../src/GLX/libglx.c:1133
#2  0xeef46a19 in ?? () from /home/sam/.steam/debian-installation/ubuntu12_32/vgui2_s.so
#3  0xeef5924f in ?? () from /home/sam/.steam/debian-installation/ubuntu12_32/vgui2_s.so
#4  0xf514a2aa in ?? () from /home/sam/.steam/debian-installation/ubuntu12_32/steamui.so
#5  0xf4771f80 in ?? () from /home/sam/.steam/debian-installation/ubuntu12_32/steamui.so
#6  0xf4913219 in ?? () from /home/sam/.steam/debian-installation/ubuntu12_32/steamui.so
#7  0x567f418a in ?? ()
#8  0x567f563e in ?? ()
#9  0x567f6175 in ?? ()
[#10](/issue/ValveSoftware/steam-for-linux/10) 0xf7c6df21 in __libc_start_call_main (main=main@entry=0x567f6130, argc=argc@entry=2, argv=argv@entry=0xffffc2a4) at ../sysdeps/nptl/libc_start_call_main.h:58
[#11](/issue/ValveSoftware/steam-for-linux/11) 0xf7c6dff8 in __libc_start_main_impl (main=0x567f6130, argc=2, argv=0xffffc2a4, init=0x56f3dd90, fini=0x56f3de00, rtld_fini=0xf7fcbf80 <_dl_fini>, stack_end=0xffffc29c) at ../csu/libc-start.c:360
[#12](/issue/ValveSoftware/steam-for-linux/12) 0x567dc031 in ?? ()
(gdb) exit/

Steps for reproducing this issue:

1. Run steam (in terminal)

Driver info:

0b:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 44 [Radeon RX 9060 XT] (rev c0) (prog-if 00 [VGA controller])
	Subsystem: Gigabyte Technology Co., Ltd Device 2430
	Flags: bus master, fast devsel, latency 0, IRQ 84, IOMMU group 18
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Memory at e0000000 (64-bit, prefetchable) [size=2M]
	I/O ports at d000 [size=256]
	Memory at fcb00000 (32-bit, non-prefetchable) [size=512K]
	Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Legacy Endpoint, IntMsgNum 0
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Capabilities: [200] Physical Resizable BAR
	Capabilities: [240] Power Budgeting <?>
	Capabilities: [270] Secondary PCI Express
	Capabilities: [2a0] Access Control Services
	Capabilities: [2d0] Process Address Space ID (PASID)
	Capabilities: [320] Latency Tolerance Reporting
	Capabilities: [410] Physical Layer 16.0 GT/s
	Capabilities: [450] Lane Margining at the Receiver
	Capabilities: [500] Physical Layer 32.0 GT/s
	Kernel driver in use: amdgpu
	Kernel modules: amdgpu

[Wed Jul 01 09:15 AM] sam@pc:~$ apt show firmware-amd-graphics 
Package: firmware-amd-graphics
Version: 20260519-1
Priority: optional
Section: non-free-firmware/kernel
Source: firmware-nonfree
Maintainer: Debian Kernel Team <[email protected]>
Installed-Size: 96.7 MB
Homepage: https://gitlab.com/kernel-firmware/linux-firmware
Download-Size: 15.5 MB
APT-Manual-Installed: yes
APT-Sources: http://deb.debian.org/debian forky/non-free-firmware amd64 Packages

[Wed Jul 01 09:17 AM] sam@pc:~$ apt show steam-launcher
Package: steam-launcher
Version: 1:1.0.0.85
Priority: optional
Section: games
Source: steam
Maintainer: Valve Corporation <[email protected]>
Installed-Size: 20.5 MB
Provides: steam, steam-devices, steam-installer
Pre-Depends: dpkg (>= 1.17.0)
Depends: apt (>= 1.1), apt (>= 1.6) | apt-transport-https, ca-certificates, coreutils (>= 8.23-1~), curl, default-dbus-session-bus | dbus-session-bus | dbus-x11, file, libc6 (>= 2.15), libnss3 (>= 2:3.26), lsof, pkexec | policykit->
Recommends: steam-libs-amd64, steam-libs-i386, sudo, xdg-desktop-portal, xdg-desktop-portal-gtk | xdg-desktop-portal-backend, xdg-utils | steamos-base-files
Conflicts: steam-devices, steam-installer
Breaks: steam64
Replaces: steam, steam-devices, steam-installer, steam64
Homepage: http://www.steampowered.com/
Download-Size: 20.3 MB
APT-Manual-Installed: yes
APT-Sources: https://repo.steampowered.com/steam stable/steam amd64 Packages
Description: Launcher for the Steam software distribution service
 Steam is a software distribution service with an online store, automated
 installation, automatic updates, achievements, SteamCloud synchronized
 savegame and screenshot functionality, and many social features.