Sway fails to start in a fresh Debian 12 virtual machine under KVM/QEMU: "DRI2: failed to create screen".

[higher-order]

• Sway Version:

  • sway version 1.7

• Debug Log:

  • https://gist.github.com/higher-order/90b4b61b51af41e82cd45b276e044e97

• Configuration File:

  • Default

• Stack Trace:

(gdb) bt full
#0  0x00007fd99781f882 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#1  0x00007fd99781fbdd in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#2  0x00007fd9978d266c in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#3  0x00007fd9978d34c5 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#4  0x00007fd9978d35db in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#5  0x00007fd99730bf97 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#6  0x00007fd99a2221c4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
        ret = <optimized out>
        pd = <optimized out>
        out = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140572329240256, -2115298659480049604, -544, 2, 140728031792912, 140572320849920, 2096395304618485820, 2096363330870896700}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, 
              canceltype = 0}}}
        not_first_call = <optimized out>
#7  0x00007fd99a2a285c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
No locals.

• Description:
  • I'm creating a new KVM/QEMU virtual machine with a fresh install of Debian 12, and trying to run Sway in it. My first attempt didn't install any DE like GNOME or KDE, since I thought I would be running Sway. After doing sudo apt install sway and then sway, it crashed with error messages saying "EGL_NOT_INITIALIZED", "DRI2: failed to create screen", etc.
    
  • I thought maybe some critical packages are missing. So I deleted the VM and restarted the install from scratch. This time I installed GNOME during Debian's installation wizard. After the installation finished, GNOME was able to run and everything appeared normal. GNOME appeared to run in Wayland rather than X11 as well, as indicated by echo $XDG_SESSION_TYPE. So I installed Sway, switched to another tty by pressing Ctrl-Alt-F3, and started Sway again. But the same error messages were shown. The logs and traces were uploaded above.
  • There aren't any dedicated GPUs on my laptop.

[emersion]

This is a very old version of Sway. Can you reproduce with a more recent one, e.g. by building from source?

[higher-order]

@emersion I would try but the "install dependencies" sections of both Sway and wlroots are unclear about which package to install. E.g. On Debian 12, apt show cairo doesn't return a package, while apt search cairo returns many packages.

[emersion]

The wiki has a guide, with a list of Debian packages: https://github.com/swaywm/sway/wiki/Development-Setup

[higher-order]

Running ninja -C build/ shows:

Found ninja-1.11.1 at /usr/bin/ninja
Cleaning... 0 files.
[2/791] Compiling C object subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr.c.o
FAILED: subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr.c.o 
cc -Isubprojects/libdrm/intel/libdrm_intel.so.1.124.0.p -Isubprojects/libdrm/intel -I../subprojects/libdrm/intel -Isubprojects/libdrm -I../subprojects/libdrm -I../subprojects/libdrm/include/drm -fvisibility=hidden -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c11 -O0 -g -include /home/user/sway/build/subprojects/libdrm/config.h -fPIC -pthread -Wsign-compare -Werror=undef -Werror=implicit-function-declaration -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wpacked -Wswitch-enum -Wmissing-format-attribute -Wstrict-aliasing=2 -Winit-self -Winline -Wshadow -Wdeclaration-after-statement -Wold-style-definition -Wno-unused-parameter -Wno-attributes -Wno-long-long -Wno-missing-field-initializers -MD -MQ subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr.c.o -MF subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr.c.o.d -o subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr.c.o -c ../subprojects/libdrm/intel/intel_bufmgr.c
In file included from ../subprojects/libdrm/intel/intel_bufmgr.c:34:
../subprojects/libdrm/include/drm/i915_drm.h:2233:1: error: packed attribute is unnecessary for \u2018i915_context_engines_load_balance\u2019 [-Werror=packed]
 2233 | } __attribute__((packed));
      | ^
../subprojects/libdrm/include/drm/i915_drm.h:2271:1: error: packed attribute is unnecessary for \u2018i915_context_engines_bond\u2019 [-Werror=packed]
 2271 | } __attribute__((packed));
      | ^
../subprojects/libdrm/include/drm/i915_drm.h:2399:1: error: packed attribute is unnecessary for \u2018i915_context_engines_parallel_submit\u2019 [-Werror=packed]
 2399 | } __attribute__((packed));
      | ^
../subprojects/libdrm/include/drm/i915_drm.h:2473:1: error: packed attribute is unnecessary for \u2018i915_context_param_engines\u2019 [-Werror=packed]
 2473 | } __attribute__((packed));
      | ^
cc1: all warnings being treated as errors
[4/791] Compiling C object subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr_fake.c.o
FAILED: subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr_fake.c.o 
cc -Isubprojects/libdrm/intel/libdrm_intel.so.1.124.0.p -Isubprojects/libdrm/intel -I../subprojects/libdrm/intel -Isubprojects/libdrm -I../subprojects/libdrm -I../subprojects/libdrm/include/drm -fvisibility=hidden -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -std=c11 -O0 -g -include /home/user/sway/build/subprojects/libdrm/config.h -fPIC -pthread -Wsign-compare -Werror=undef -Werror=implicit-function-declaration -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wpacked -Wswitch-enum -Wmissing-format-attribute -Wstrict-aliasing=2 -Winit-self -Winline -Wshadow -Wdeclaration-after-statement -Wold-style-definition -Wno-unused-parameter -Wno-attributes -Wno-long-long -Wno-missing-field-initializers -MD -MQ subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr_fake.c.o -MF subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr_fake.c.o.d -o subprojects/libdrm/intel/libdrm_intel.so.1.124.0.p/intel_bufmgr_fake.c.o -c ../subprojects/libdrm/intel/intel_bufmgr_fake.c
In file included from ../subprojects/libdrm/intel/intel_bufmgr_fake.c:47:
../subprojects/libdrm/include/drm/i915_drm.h:2233:1: error: packed attribute is unnecessary for \u2018i915_context_engines_load_balance\u2019 [-Werror=packed]
 2233 | } __attribute__((packed));
      | ^
../subprojects/libdrm/include/drm/i915_drm.h:2271:1: error: packed attribute is unnecessary for \u2018i915_context_engines_bond\u2019 [-Werror=packed]
 2271 | } __attribute__((packed));
      | ^
../subprojects/libdrm/include/drm/i915_drm.h:2399:1: error: packed attribute is unnecessary for \u2018i915_context_engines_parallel_submit\u2019 [-Werror=packed]
 2399 | } __attribute__((packed));
      | ^
../subprojects/libdrm/include/drm/i915_drm.h:2473:1: error: packed attribute is unnecessary for \u2018i915_context_param_engines\u2019 [-Werror=packed]
 2473 | } __attribute__((packed));
      | ^
cc1: all warnings being treated as errors
ninja: build stopped: subcommand failed.

I tried replacing werror=true with werror=false in all the meson.build files in the project and subprojects and then running ninja -C build/ again. But it still showed the same thing.

[emersion]

The meson.build files only contain the defaults. Newer Meson has per-subproject knobs for werror, but maybe your version is older. Maybe try meson configure build/ -Dwerror=false?

[higher-order]

@emersion I did that followed by a clean rebuild. It compiled. But running build/sway/sway freezes after showing:

libEGL warning: egl: failed to create dri2 screen
00:00:00.056 [wlr] [EGL] command: eglInitialize, error: EGL_NOT_INITIALIZED (0x3001), message: "DRI2: failed to create screen"
libEGL warning: NEEDS EXTENSION: falling back to kms_swrast
00:00:00.075 [sway/commands/output/background.c:121] Unable to access background file '/home/user/.config/sway/@datadir@/backgrounds/sway/Sway_Wallpaper_Blue_1920x1080.png': No such file or directory
00:00:00.077 [sway/config.c:830] Error on line 24 'output * bg @datadir@/backgrounds/sway/Sway_Wallpaper_Blue_1920x1080.png fill': unable to access background file '/home/user/.config/sway/@datadir@/backgrounds/sway/Sway_Wallpaper_Blue_1920x1080.png' (/home/user/.config/sway/config)
00:00:00.077 [sway/config.c:440] Error(s) loading config!
sh: 1: swaynag: not found
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.096 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.096 [wlr] [render/swapchain.c:105] Failed to allocate buffer
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.096 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.096 [wlr] [render/swapchain.c:105] Failed to allocate buffer
00:00:00.096 [sway/config/output.c:887] Requested backend configuration failed, searching for valid fallbacks
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.096 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.096 [wlr] [render/swapchain.c:105] Failed to allocate buffer
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.096 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.096 [wlr] [render/swapchain.c:105] Failed to allocate buffer
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.096 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.096 [wlr] [render/swapchain.c:105] Failed to allocate buffer
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.096 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.096 [wlr] [render/swapchain.c:105] Failed to allocate buffer
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.097 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.097 [wlr] [render/swapchain.c:105] Failed to allocate buffer
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Permission denied
00:00:00.097 [wlr] [render/allocator/gbm.c:118] gbm_bo_create failed: Permission denied
00:00:00.097 [wlr] [render/swapchain.c:105] Failed to allocate buffer
00:00:00.098 [sway/config/output.c:1080] failed to execute 'swaybg' (background configuration probably not applied): No such file or directory

If I start a new tty (by pressing Ctrl-Alt-F3) and then running build/sway/sway, it shows:

[smlx]

Debian testing has a recent version of sway that might be easier to install and test.