[BUG] vrcompositor sefaults after ~15 seconds with Mesa 26

[Spacefish]

When running SteamVR with Mesa 26, there seems to be multiple issues.. The same setup works fine with Mesa 25.3

It seems to work for a couple of seconds, where i am in the compositor and can see the controllers, however the dashboard is not shown, then vrcompositor segfaults.

[  209.493522] RenderThread[9478]: segfault at 0 ip 00006549867e87cb sp 00007af6f74680b0 error 4 in vrcompositor[2ac7cb,65498653c000+50f000] likely on CPU 8 (core 0, socket 0)
[  209.493530] Code: ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 56 41 89 ce 41 55 49 89 fd 48 89 f7 41 54 49 89 d4 53 48 83 ec 30 <48> 8b 06 ff 50 18 f6 40 20 10 48 89 c3 0f 85 1a 01 00 00 4d 85 e4

i enabled drm trace logging (see dmesg.log).

When i enable vulkan validation layers i see a lot of

Validation Error: [ VUID-VkImageMemoryBarrier-oldLayout-01208 ] | MessageID = 0xf855a75b
vkCmdPipelineBarrier(): pImageMemoryBarriers[0].newLayout (VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL) is not compatible with VkImage 0x80000000008[SwapChainImage] usage flags VK_IMAGE_USAGE_TRANSFER_DST_BIT|VK_IMAGE_USAGE_STORAGE_BIT.
The Vulkan spec states: If srcQueueFamilyIndex and dstQueueFamilyIndex define a queue family ownership transfer or oldLayout and newLayout define an image layout transition, and oldLayout or newLayout is VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL then image must have been created with the VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT usage flag set (https://vulkan.lunarg.com/doc/view/1.4.335.0/linux/antora/spec/latest/chapters/synchronization.html#VUID-VkImageMemoryBarrier-oldLayout-01208)
Objects: 1
    [0] VkImage 0x80000000008[SwapChainImage]

and

Validation Error: [ VUID-vkCmdBeginRenderPass-initialLayout-00895 ] | MessageID = 0x34f84ef4
(Warning - This VUID has now been reported 10 times, which is the duplicate_message_limit value, this will be the last time reporting it).
vkCmdBeginRenderPass(): pRenderPassBegin->renderPass (VkRenderPass 0x3e300000003e3) was created with pCreateInfo->pAttachments[0].initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL, but VkFramebuffer 0x3e400000003e4 pAttachments[0] (VkImageView 0xb000000000b[SwapChainImageView]) usage is VK_IMAGE_USAGE_TRANSFER_DST_BIT|VK_IMAGE_USAGE_STORAGE_BIT.
The Vulkan spec states: If any of the initialLayout or finalLayout member of the VkAttachmentDescription structures or the layout member of the VkAttachmentReference structures specified when creating the render pass specified in the renderPass member of pRenderPassBegin is VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL then the corresponding attachment image view of the framebuffer specified in the framebuffer member of pRenderPassBegin must have been created with the VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT usage flag set (https://vulkan.lunarg.com/doc/view/1.4.335.0/linux/antora/spec/latest/chapters/renderpass.html#VUID-vkCmdBeginRenderPass-initialLayout-00895)
Objects: 4
    [0] VkImage 0x80000000008[SwapChainImage]
    [1] VkRenderPass 0x3e300000003e3
    [2] VkFramebuffer 0x3e400000003e4
    [3] VkImageView 0xb000000000b[SwapChainImageView]

There are a lot of logmessages like in vrcompositor.log:

Thu Jan 29 2026 23:12:43.902972 [Error] - VulkanVRRenderer::ImportTextureFromSharedHandle - Failed to import shared image.

and in vrclient_wine64-preloader.txt i finds this:

Do Jan 29 2026 22:58:49.941670 [Error] - No GPU timing Vulkan device in CVRCompositorSharedTextures::BeginGPUTimingCommandBuffer!
Do Jan 29 2026 22:58:49.941683 [Error] - No Vulkan command buffer open in CGpuTiming::MarkEvent!
Do Jan 29 2026 22:58:49.941691 [Error] - Invalid command buffer in CVRCompositorSharedTextures::FinishOpenCommandBuffer!
Do Jan 29 2026 22:58:50.032679 [Info] - Enable advanced image processing of scene textures.
Do Jan 29 2026 22:58:50.050939 [Info] - Initializing CVulkanVRRenderer
Do Jan 29 2026 22:58:50.051050 [Info] - Debug utils: disabled, missing entrypoints
Do Jan 29 2026 22:58:50.054066 [Info] - Initialized Vulkan transfer ring buffer, mapped at offset 0x0x7f858ff1e000.
Do Jan 29 2026 22:58:50.054485 [Info] - Supports dmabuf formats + modifiers? - Yes!
Do Jan 29 2026 22:58:50.076608 [Info] - Setting max texture dimensions to 3227x3586 before requiring downsampling
Do Jan 29 2026 22:58:50.078853 [Info] - Created remote Vulkan image 0x4e000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.078921 [Info] - Unsupported Vulkan texture format: -1
Do Jan 29 2026 22:58:50.080889 [Info] - Created remote Vulkan image 0x4f000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.083172 [Info] - Created remote Vulkan image 0x50000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.083243 [Info] - Unsupported Vulkan texture format: -1
Do Jan 29 2026 22:58:50.085186 [Info] - Created remote Vulkan image 0x51000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.086968 [Info] - Created remote Vulkan image 0x52000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.087163 [Info] - Unsupported Vulkan texture format: -1
Do Jan 29 2026 22:58:50.089118 [Info] - Created remote Vulkan image 0x53000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.091123 [Info] - Created remote Vulkan image 0x54000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.091163 [Info] - Unsupported Vulkan texture format: -1
Do Jan 29 2026 22:58:50.092777 [Info] - Created remote Vulkan image 0x55000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.094302 [Info] - Created remote Vulkan image 0x56000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.094326 [Info] - Unsupported Vulkan texture format: -1
Do Jan 29 2026 22:58:50.095881 [Info] - Created remote Vulkan image 0x57000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.097345 [Info] - Created remote Vulkan image 0x58000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.
Do Jan 29 2026 22:58:50.097368 [Info] - Unsupported Vulkan texture format: -1
Do Jan 29 2026 22:58:50.098721 [Info] - Created remote Vulkan image 0x59000077a1, dimensions 2952 x 3280, format 43, memory size 40894464 and memory type 0.

xrclient_wine64-preloader.txt
xrclient_wayvr.txt
webhelper.txt
vrwebhelper_systemui.txt
vrwebhelper_settings_desktop.txt
vrstartup.txt
vrserver.txt
vrmonitor.txt
vrcompositor.txt
vrclient_wine64-preloader.txt
vrclient_vrwebhelper_main.txt
vrclient_vrcompositor.txt
vrclient_steam.txt
steamui_audio.txt
driver_vrlink.txt
console_log.txt
cloud_log.txt
dmesg.log.gz

[kisak-valve]

Hello @Spacefish, a regression in your video driver should also be reported to your video driver vendor.

[Spacefish]

Hello @Spacefish, a regression in your video driver should also be reported to your video driver vendor.

It´s amdgpu / RADV, i see a lot of vulkan validation errors that VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT is missing. Not sure if the crash might be a result of this / a new timing of the newer RADV driver which might trigger the crash now?