pressing vsync causes SIGTRAP

[Abhinavpatel00]

`./build/vk_minimal_latest
[15:41:37.076] Starting ...
[15:41:37.117] VULKAN API: 1.4
[15:41:37.126] Validation Layers: ON
[15:41:37.127] Selected GPU: Intel(R) UHD Graphics (TGL GT2)
[15:41:37.127] Driver: 25.1.1
[15:41:37.127] Vulkan API: 1.4.311
[15:41:37.145] Enabled device extensions:
[15:41:37.145] VK_KHR_swapchain
[15:41:37.145] VK_KHR_push_descriptor
[15:41:37.145] VK_EXT_extended_dynamic_state
[15:41:37.145] VK_EXT_extended_dynamic_state2
[15:41:37.145] VK_EXT_extended_dynamic_state3
[15:41:37.145] VK_EXT_swapchain_maintenance1
[15:41:37.145] VK_KHR_dynamic_rendering
Validation Error: [ VUID-vkAcquireNextImageKHR-semaphore-01779 ] | MessageID = 0x5717e75b
vkAcquireNextImageKHR(): Semaphore must not have any pending operations.
The Vulkan spec states: If semaphore is not VK_NULL_HANDLE, it must not have any uncompleted sig
nal or wait operations pending (https://docs.vulkan.org/spec/latest/chapters/VK_KHR_surface/wsi.
html#VUID-vkAcquireNextImageKHR-semaphore-01779)
Objects: 1
[0] VkSemaphore 0x970000000097[N5utils9SwapchainE::m_frameResources[i].imageAvailableSemapho
re ( in minimal_latest.cpp:1172)]

[15:41:40.889] vkAcquireNextImageKHR(): Semaphore must not have any pending operations.
The Vulkan spec states: If semaphore is not VK_NULL_HANDLE, it must not have any uncompleted sig
nal or wait operations pending (https://docs.vulkan.org/spec/latest/chapters/VK_KHR_surface/wsi.
html#VUID-vkAcquireNextImageKHR-semaphore-01779)
`

[mklefrancois]

Hi @Abhinavpatel00,

I couldn't reproduce this issue. There was an issue with the latest Vulkan SDK reporting it, but this was fixed two weeks ago.

To help reproduce the issue, could you please provide the following details?

• Operating system
• Driver version
• Vulkan SDK

Thanks

[Abhinavpatel00]

operating system :- arch linux(wayland)
driver version :-Mesa 25.1.2-arch1.1
vulkan sdk ;- 1.4.311

thank you

[incon]

Same issue, Wayland, Arch Linux.

[incon]

/home/incon/vk_minimal_latest/cmake-build-debug/vk_minimal_latest
[21:07:37.529] Starting ... 
[21:07:37.551] VULKAN API: 1.4
[21:07:37.565] Validation Layers: ON
[21:07:37.565] Selected GPU: Intel(R) Graphics (LNL)
[21:07:37.565] Driver: 25.1.7
[21:07:37.565] Vulkan API: 1.4.311
[21:07:37.581] Enabled device extensions:
[21:07:37.581]   VK_KHR_swapchain
[21:07:37.581]   VK_KHR_push_descriptor
[21:07:37.581]   VK_EXT_extended_dynamic_state
[21:07:37.581]   VK_EXT_extended_dynamic_state2
[21:07:37.581]   VK_EXT_extended_dynamic_state3
[21:07:37.581]   VK_EXT_swapchain_maintenance1
[21:07:37.581]   VK_KHR_dynamic_rendering
Validation Error: [ VUID-vkResetCommandPool-commandPool-00040 ] | MessageID = 0xb53e2331
vkResetCommandPool(): (VkCommandBuffer 0x55f019b5d150[13MinimalLatest::m_frameData[i].cmdBuffer ( in minimal_latest.cpp:2370)]) is in use.
The Vulkan spec states: All VkCommandBuffer objects allocated from commandPool must not be in the pending state (https://docs.vulkan.org/spec/latest/chapters/cmdbuffers.html#VUID-vkResetCommandPool-commandPool-00040)
Objects: 2
    [0] VkCommandBuffer 0x55f019b5d150[13MinimalLatest::m_frameData[i].cmdBuffer ( in minimal_latest.cpp:2370)]
    [1] VkCommandPool 0x180000000018[13MinimalLatest::m_frameData[i].cmdPool ( in minimal_latest.cpp:2361)]

[21:07:50.060] vkResetCommandPool(): (VkCommandBuffer 0x55f019b5d150[13MinimalLatest::m_frameData[i].cmdBuffer ( in minimal_latest.cpp:2370)]) is in use.
The Vulkan spec states: All VkCommandBuffer objects allocated from commandPool must not be in the pending state (https://docs.vulkan.org/spec/latest/chapters/cmdbuffers.html#VUID-vkResetCommandPool-commandPool-00040)

Process finished with exit code 133 (interrupted by signal 5:SIGTRAP)

[mklefrancois]

I made an update in da485ec which I hope fixes the issue encounter on this platform.

@incon, can you please let me know if this fixes it?

[incon]

19:15:51.625] Starting ... 
[19:15:51.649] VULKAN API: 1.4
[19:15:51.662] Validation Layers: ON
[19:15:51.662] Selected GPU: Intel(R) Graphics (LNL)
[19:15:51.662] Driver: 25.1.7
[19:15:51.662] Vulkan API: 1.4.311
[19:15:51.677] Enabled device extensions:
[19:15:51.677]   VK_KHR_swapchain
[19:15:51.677]   VK_KHR_push_descriptor
[19:15:51.677]   VK_EXT_extended_dynamic_state
[19:15:51.677]   VK_EXT_extended_dynamic_state2
[19:15:51.677]   VK_EXT_extended_dynamic_state3
[19:15:51.677]   VK_EXT_swapchain_maintenance1
[19:15:51.677]   VK_KHR_dynamic_rendering
[19:15:51.686] Created application descriptor pool: 10000 textures, 20 sets
[19:15:51.686] Created UI descriptor pool: 20 textures, 20 sets
Validation Error: [ VUID-vkAcquireNextImageKHR-semaphore-01779 ] | MessageID = 0x5717e75b
vkAcquireNextImageKHR(): Semaphore must not have any pending operations.
The Vulkan spec states: If semaphore is not VK_NULL_HANDLE, it must not have any uncompleted signal or wait operations pending (https://docs.vulkan.org/spec/latest/chapters/VK_KHR_surface/wsi.html#VUID-vkAcquireNextImageKHR-semaphore-01779)
Objects: 1
    [0] VkSemaphore 0x960000000096[N5utils9SwapchainE::m_frameResources[i].imageAvailableSemaphore ( in minimal_latest.cpp:1175)]

[19:16:00.332] vkAcquireNextImageKHR(): Semaphore must not have any pending operations.
The Vulkan spec states: If semaphore is not VK_NULL_HANDLE, it must not have any uncompleted signal or wait operations pending (https://docs.vulkan.org/spec/latest/chapters/VK_KHR_surface/wsi.html#VUID-vkAcquireNextImageKHR-semaphore-01779)

Process finished with exit code 133 (interrupted by signal 5:SIGTRAP)

[mklefrancois]

Thanks for testing, and I'm sorry about that. I'll look for a computer with this operating system.

[Abhinavpatel00]

Thanks for testing, and I'm sorry about that. I'll look for a computer with this operating system.

i solved the issue with inserting fence before getting next frame, if that helps

[mklefrancois]

Thank you for providing this information, it is very interesting. This behavior probably indicates that the current driver isn't implementing the timeline semaphore synchronization properly. The VkFence shouldn't be necessary, since the timeline semaphore is a more modern and efficient method of synchronizing frames in flight.

We have tried this on various Linux platforms and have been unable to reproduce the problem. This really suggests that the driver isn't doing what it should. This sample shows the latest Vulkan API usage and might not work on older drivers.

If the issue persists, you should check for available driver updates.

[Abhinavpatel00]

Thank you for providing this information, it is very interesting. This behavior probably indicates that the current driver isn't implementing the timeline semaphore synchronization properly. The VkFence shouldn't be necessary, since the timeline semaphore is a more modern and efficient method of synchronizing frames in flight.

We have tried this on various Linux platforms and have been unable to reproduce the problem. This really suggests that the driver isn't doing what it should. This sample shows the latest Vulkan API usage and might not work on older drivers.

If the issue persists, you should check for available driver updates.

hey , thanks for reply , i think you are current it might be the issue i checked https://docs.mesa3d.org/relnotes/25.2.0.html
and it has fixes for race conditions in timeline semaphores , mine is just 25.1.7 , so i guess this might be the issue

[mklefrancois]

Could you please try with the latest driver and let me know if the issue is gone?

[incon]

[15:56:30.893] Starting ... 
[15:56:30.924] VULKAN API: 1.4
[15:56:30.954] Validation Layers: ON
[15:56:30.954] Selected GPU: Intel(R) Graphics (LNL)
[15:56:30.955] Driver: 25.2.1
[15:56:30.955] Vulkan API: 1.4.318
[15:56:30.968] Enabled device extensions:
[15:56:30.969]   VK_KHR_swapchain
[15:56:30.969]   VK_KHR_push_descriptor
[15:56:30.969]   VK_EXT_extended_dynamic_state
[15:56:30.969]   VK_EXT_extended_dynamic_state2
[15:56:30.969]   VK_EXT_extended_dynamic_state3
[15:56:30.969]   VK_EXT_swapchain_maintenance1
[15:56:30.969]   VK_KHR_dynamic_rendering
[15:56:30.976] Created application descriptor pool: 10000 textures, 20 sets
[15:56:30.977] Created UI descriptor pool: 20 textures, 20 sets
Validation Error: [ VUID-vkAcquireNextImageKHR-semaphore-01779 ] | MessageID = 0x5717e75b
vkAcquireNextImageKHR(): Semaphore must not have any pending operations.
The Vulkan spec states: If semaphore is not VK_NULL_HANDLE, it must not have any uncompleted signal or wait operations pending (https://docs.vulkan.org/spec/latest/chapters/VK_KHR_surface/wsi.html#VUID-vkAcquireNextImageKHR-semaphore-01779)
Objects: 1
    [0] VkSemaphore 0x880000000088[N5utils9SwapchainE::m_frameResources[i].imageAvailableSemaphore ( in minimal_latest.cpp:1175)]

[15:56:40.238] vkAcquireNextImageKHR(): Semaphore must not have any pending operations.
The Vulkan spec states: If semaphore is not VK_NULL_HANDLE, it must not have any uncompleted signal or wait operations pending (https://docs.vulkan.org/spec/latest/chapters/VK_KHR_surface/wsi.html#VUID-vkAcquireNextImageKHR-semaphore-01779)

Process finished with exit code 133 (interrupted by signal 5:SIGTRAP)

[mpalomas]

I confirm this is also happening on (some) AMD GPU, such as my Radeon 5700XT:

11:15:08.475] Starting ... 
[11:15:08.514] VULKAN API: 1.4
[11:15:08.535] Validation Layers: ON
[11:15:08.537] Selected GPU: AMD Radeon RX 5700 XT (RADV NAVI10)
[11:15:08.537] Driver: 25.3.3
[11:15:08.537] Vulkan API: 1.4.328
[11:15:08.537] Optional extension VK_KHR_unified_image_layouts is not available, skipping
[11:15:08.539] Enabled device extensions:
[11:15:08.539]   VK_KHR_swapchain
[11:15:08.539]   VK_EXT_extended_dynamic_state3
[11:15:08.542] Created application descriptor pool: 10000 textures, 20 sets
[11:15:08.542] Created UI descriptor pool: 20 textures, 20 sets
Validation Error: [ VUID-VkSubmitInfo2-semaphore-03882 ] | MessageID = 0x63d94c0e
vkQueueSubmit2(): pSubmits[0].pSignalSemaphoreInfos[1].semaphore signal value (260826) in VkQueue 0x559c6f681290 must be greater than current timeline semaphore VkSemaphore 0x160000000016[13MinimalLatest::m_frameTimelineSemaphore ( in minimal_latest.cpp:2525)] value (260826).
The Vulkan spec states: If the semaphore member of any element of pSignalSemaphoreInfos is a timeline semaphore, the value member of that element must have a value greater than the current value of the semaphore when the semaphore signal operation is executed (https://vulkan.lunarg.com/doc/view/1.4.335.0/linux/antora/spec/latest/chapters/cmdbuffers.html#VUID-VkSubmitInfo2-semaphore-03882)
Objects: 2
    [0] VkSemaphore 0x160000000016[13MinimalLatest::m_frameTimelineSemaphore ( in minimal_latest.cpp:2525)]
    [1] VkQueue 0x559c6f681290

[11:17:32.425] vkQueueSubmit2(): pSubmits[0].pSignalSemaphoreInfos[1].semaphore signal value (260826) in VkQueue 0x559c6f681290 must be greater than current timeline semaphore VkSemaphore 0x160000000016[13MinimalLatest::m_frameTimelineSemaphore ( in minimal_latest.cpp:2525)] value (260826).
The Vulkan spec states: If the semaphore member of any element of pSignalSemaphoreInfos is a timeline semaphore, the value member of that element must have a value greater than the current value of the semaphore when the semaphore signal operation is executed (https://vulkan.lunarg.com/doc/view/1.4.335.0/linux/antora/spec/latest/chapters/cmdbuffers.html#VUID-VkSubmitInfo2-semaphore-03882)
fish: Job 1, './vk_minimal_latest' terminated by signal SIGTRAP (Trace or breakpoint trap)
`

[bbarran]

I tested (66aac65) on RTX 6000 Ada with 570.86.10 driver and worked as expected