Steam + VGL crash after logging in

[lidantosnat]

Steam is crashing when started with virtualgl after logging into account.

Clean Debian 12 installed in a VM with GPU passthrough.
Installed latest stable version of steam from the steam repository.
Installed latest stable version of virtualgl and virtualgl32 from the virtualgl repository.
NVIDIA open dkms driver 560.35.03-1 installed from NVIDIA repository.
Kernel 6.1.0-25-amd64.

$ dpkg -l | grep -e virtualgl -e steam
ii  steam-launcher                          1:1.0.0.81                              all          Launcher for the Steam software distribution service
ii  steam-libs-amd64                        1:1.0.0.81                              amd64        Steam libraries metapackage
ii  steam-libs-i386:i386                    1:1.0.0.81                              i386         Steam libraries metapackage
ii  virtualgl                               3.1.1-20240228                          amd64        A toolkit for displaying OpenGL applications to thin clients
ii  virtualgl32                             3.1.1-20240228                          amd64        A toolkit for displaying OpenGL applications to thin clients

On first steam+virtualgl start I'm getting to the login window but it's crashing when I login there.
All subsequent logged in steam+vurtialgl runs will crash.

I have these errors in the steam log:

ERROR: ld.so: object 'libdlfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libvglfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libdlfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libvglfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.

$ vglrun steam

steam.sh[1407]: Running Steam on debian 12 64-bit
steam.sh[1407]: STEAM_RUNTIME is enabled automatically
setup.sh[1535]: Steam runtime environment up-to-date!
steam.sh[1407]: Steam client's requirements are satisfied
[2024-09-27 16:52:30] Startup - updater built Sep 17 2024 20:02:19
[2024-09-27 16:52:30] Startup - Steam Client launched with: '/home/user/.local/share/Steam/ubuntu12_32/steam' '-srt-logger-opened'
09/27 16:52:30 minidumps folder is set to /tmp/dumps
09/27 16:52:30 Init: Installing breakpad exception handler for appid(steam)/version(1726604483)/tid(1604)
Looks like steam didn't shutdown cleanly, scheduling immediate update check
[2024-09-27 16:52:30] Loading cached metrics from disk (/home/user/.local/share/Steam/package/steam_client_metrics.bin)
[2024-09-27 16:52:30] Using the following download hosts for Public, Realm steamglobal
[2024-09-27 16:52:30] 1. https://client-update.akamai.steamstatic.com, /, Realm 'steamglobal', weight was 1000, source = 'update_hosts_cached.vdf'
[2024-09-27 16:52:30] 2. https://cdn.cloudflare.steamstatic.com, /client/, Realm 'steamglobal', weight was 1, source = 'update_hosts_cached.vdf'
[2024-09-27 16:52:30] 3. https://client-update.steamstatic.com, /, Realm 'steamglobal', weight was 1, source = 'baked in'
[2024-09-27 16:52:30] Checking for update on startup
[2024-09-27 16:52:30] Checking for available updates...
[2024-09-27 16:52:30] Downloading manifest: https://client-update.akamai.steamstatic.com/steam_client_ubuntu12
[2024-09-27 16:52:30] Manifest download: send request
[2024-09-27 16:52:30] Manifest download: waiting for download to finish
[2024-09-27 16:52:31] Manifest download: finished
[2024-09-27 16:52:31] Download skipped: /steam_client_ubuntu12 version 1726604483, installed version 1726604483, existing pending version 0
[2024-09-27 16:52:31] Nothing to do
[2024-09-27 16:52:31] Verifying installation...
[2024-09-27 16:52:31] Performing checksum verification of executable files
[2024-09-27 16:52:32] Verification complete
UpdateUI: skip show logo
Steam logging initialized: directory: /home/user/.local/share/Steam/logs

XRRGetOutputInfo Workaround: initialized with override: 0 real: 0xe6f0b370
XRRGetCrtcInfo Workaround: initialized with override: 0 real: 0xe6f09cc0
steamwebhelper.sh[1650]: Using supervisor /home/user/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/usr/bin/steam-runtime-supervisor
steamwebhelper.sh[1650]: Starting steamwebhelper under bootstrap sniper steam runtime via /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-sniper.sh
steamwebhelper.sh[1650]: Using CEF sandbox \(try with -no-cef-sandbox if this fails\)
steamwebhelper.sh[1650]: Starting steamwebhelper with Sniper steam runtime at /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-sniper/_v2-entry-point
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  130 (MIT-SHM)
  Minor opcode of failed request:  3 (X_ShmPutImage)
  Serial number of failed request:  44
  Current serial number in output stream:  45
Steam Runtime Launch Service: starting steam-runtime-launcher-service
Steam Runtime Launch Service: steam-runtime-launcher-service is running pid 1743
bus_name=com.steampowered.PressureVessel.LaunchAlongsideSteam
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  130 (MIT-SHM)
  Minor opcode of failed request:  3 (X_ShmPutImage)
  Serial number of failed request:  44
  Current serial number in output stream:  45
pressure-vessel-wrap[1677]: N: Not replacing "/etc/vulkan/explicit_layer.d" with tmpfs: Path "/etc" is reserved by the container framework
pressure-vessel-wrap[1677]: N: Not replacing "/etc/vulkan/implicit_layer.d" with tmpfs: Path "/etc" is reserved by the container framework
ERROR: ld.so: object 'libdlfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libvglfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libdlfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libvglfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
exec ./steamwebhelper -lang=en_US -cachedir=/home/user/.local/share/Steam/config/htmlcache -steampid=1604 -buildid=1726604483 -steamid=0 -logdir=/home/user/.local/share/Steam/logs -uimode=7 -startcount=0 -userdatadir=/home/user/.local/share/Steam/config/cefdata -steamuniverse=Public -realm=Global -clientui=/home/user/.local/share/Steam/clientui -steampath=/home/user/.local/share/Steam/ubuntu12_32/steam -launcher=0 -no-restart-on-ui-mode-change --valve-enable-site-isolation --enable-smooth-scrolling --password-store=basic --log-file=/home/user/.local/share/Steam/logs/cef_log.txt --disable-quick-menu --enable-features=PlatformHEVCDecoderSupport --disable-features=SpareRendererForSitePerProcess,DcheckIsFatal
steamwebhelper.sh[1952]: Using supervisor /home/user/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/usr/bin/steam-runtime-supervisor
steamwebhelper.sh[1952]: Starting steamwebhelper under bootstrap sniper steam runtime via /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-sniper.sh
steamwebhelper.sh[1952]: Using CEF sandbox \(try with -no-cef-sandbox if this fails\)
steamwebhelper.sh[1952]: Starting steamwebhelper with Sniper steam runtime at /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-sniper/_v2-entry-point
pressure-vessel-wrap[1978]: N: Not replacing "/etc/vulkan/explicit_layer.d" with tmpfs: Path "/etc" is reserved by the container framework
pressure-vessel-wrap[1978]: N: Not replacing "/etc/vulkan/implicit_layer.d" with tmpfs: Path "/etc" is reserved by the container framework
ERROR: ld.so: object 'libdlfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libvglfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libdlfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object 'libvglfaker.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
exec ./steamwebhelper -lang=en_US -cachedir=/home/user/.local/share/Steam/config/htmlcache -steampid=1604 -buildid=1726604483 -steamid=0 -logdir=/home/user/.local/share/Steam/logs -uimode=7 -startcount=1 -userdatadir=/home/user/.local/share/Steam/config/cefdata -steamuniverse=Public -realm=Global -clientui=/home/user/.local/share/Steam/clientui -steampath=/home/user/.local/share/Steam/ubuntu12_32/steam -launcher=0 -no-restart-on-ui-mode-change --valve-enable-site-isolation --enable-smooth-scrolling --password-store=basic --log-file=/home/user/.local/share/Steam/logs/cef_log.txt --disable-quick-menu --enable-features=PlatformHEVCDecoderSupport --disable-features=SpareRendererForSitePerProcess,DcheckIsFatal
BRefreshApplicationsInLibrary 1: 1ms
Desktop state changed: desktop: { pos:    0,   0 size: 1920,2280 } primary: { pos:    0,   0 size: 1920,1200 }
BuildCompleteAppOverviewChange: 121 apps
RegisterForAppOverview 1: 3ms
RegisterForAppOverview 2: 3ms
[VGL] ERROR: in isDisplayExcluded--
[VGL]    98: Unexpected NULL condition
src/common/completionportmanager_posix.cpp (657) : m_AssocHandles.IsValidIndex( nAssocIdx )
src/common/completionportmanager_posix.cpp (657) : m_AssocHandles.IsValidIndex( nAssocIdx )
09/27 16:53:06 Failed writing minidump, nothing to upload.
/home/user/.local/share/Steam/steam.sh: line 906:  1604 Segmentation fault      "$STEAMROOT/$STEAMEXEPATH" "$@"

Other apps (glxgears/firefox) work properly.