QuoteDoes it hang with any other games? Could be some llvm/amdgpu bug.

It's known to be an llvm bug. Thing is, I cannot enable that option as long as it hangs **any** game.

Exploring the rooftops of the Crow's Perch. I managed to get into that tallest tower actually, but not on its roof.

Quoting: GuestI suspect alt-tabbing or some steam-native problems on Arch.

Could be. I was apprehensive about Touissant after hearing some horror stories, but it worked perfectly for me. No issues at all. Arch, GTX 750, switching to a 960 in the middle of playing through it*, same driver (maybe the previous one; I finished the game about a month ago). The only major difference is that I was using vanilla Wine (and Openbox; so that might be your alt-tab issue).

Oddly enough, I intended to buy it on Steam to register a Linux sale, but missed the winter sale by literally a couple of hours and went to GOG instead. Maybe I lucked out there.

*With a literal doubling of the framerate. (Going off-topic here - and it's not even a new card - but the 960's a weird upgrade over the 750. Some games show virtually no improvement at all, while others - like this - are spectacularly better.)

I'm playing it now (first playthrough) since I finally got time to do it. So I spend time exploring different places and will be posting some screenshots here, since bugs are practically non existent now :)

Mysterious elven tombstone on Fyke Isle:



It radiates yellow light, without any obvious sources like candles or torches.

Spoiler, click me

Keira's magic lamp doesn't reveal anything unusual about it

By the way, elven tombstones in the game are using Old Permic alphabet, but the text isn't saying anything interesting, it's just the alphabet cycling itself.

Exploring some wild areas.

Sunset on one of the remote Velen islands:



Thunderstorm in the bay near Lornruk, Velen:

I have not started the game for a while and now, to my surprise, the game thinks it's a fresh installation. No saves at all nor the button to Continue appears. Has someone experienced something similar?

This is the output when running the game:

000b:fixme:winediag:start_process Wine Staging 4.8 is a testing version containing experimental patches.
000b:fixme:winediag:start_process Please mention your exact version when filing bug reports on winehq.org.
000d:err:menubuilder:init_xdg error looking up the desktop directory
info:  Game: witcher3.exe
info:  DXVK: v1.1.1
warn:  OpenVR: Failed to locate module
info:  Enabled instance extensions:
info:    VK_KHR_get_physical_device_properties2
info:    VK_KHR_surface
info:    VK_KHR_win32_surface
info:  AMD RADV POLARIS10 (LLVM 8.0.0):
info:    Driver: 19.0.4
info:    Vulkan: 1.1.90
info:    Memory Heap[0]: 
info:      Size: 7936 MiB
info:      Flags: 0x1
info:      Memory Type[0]: Property Flags = 0x1
info:    Memory Heap[1]: 
info:      Size: 256 MiB
info:      Flags: 0x1
info:      Memory Type[2]: Property Flags = 0x7
info:    Memory Heap[2]: 
info:      Size: 8192 MiB
info:      Flags: 0x0
info:      Memory Type[1]: Property Flags = 0x6
info:      Memory Type[3]: Property Flags = 0xe
info:  D3D11CoreCreateDevice: Probing D3D_FEATURE_LEVEL_11_0
info:  D3D11CoreCreateDevice: Using feature level D3D_FEATURE_LEVEL_11_0
info:  Enabled device extensions:
info:    VK_EXT_conditional_rendering
info:    VK_EXT_memory_priority
info:    VK_EXT_shader_viewport_index_layer
info:    VK_EXT_transform_feedback
info:    VK_EXT_vertex_attribute_divisor
info:    VK_KHR_dedicated_allocation
info:    VK_KHR_descriptor_update_template
info:    VK_KHR_driver_properties
info:    VK_KHR_get_memory_requirements2
info:    VK_KHR_image_format_list
info:    VK_KHR_maintenance1
info:    VK_KHR_maintenance2
info:    VK_KHR_sampler_mirror_clamp_to_edge
info:    VK_KHR_shader_draw_parameters
info:    VK_KHR_swapchain
warn:  DXVK: Updating state cache version to v4
info:  DXVK: Read 0 valid state cache entries
warn:  DXVK: Creating new state cache file
info:  DXVK: Using 9 compiler threads
warn:  DXGI: VK_FORMAT_D24_UNORM_S8_UINT -> VK_FORMAT_D32_SFLOAT_S8_UINT
0039:fixme:ver:GetCurrentPackageId (0x52bfdc0 (nil)): stub
002c:fixme:win:DisableProcessWindowsGhosting : stub
002c:fixme:msvcp:_Locinfo__Locinfo_ctor_cat_cstr (000000000214E130 1 C) semi-stub
002c:fixme:msvcp:_Locinfo__Locinfo_ctor_cat_cstr (000000000214DB10 1 C) semi-stub
002c:fixme:msvcp:_Locinfo__Locinfo_ctor_cat_cstr (000000000214E4B8 1 C) semi-stub
002c:fixme:msvcp:_Locinfo__Locinfo_ctor_cat_cstr (000000000214E320 1 C) semi-stub
info:  Game: witcher3.exe
info:  DXVK: v1.1.1
warn:  OpenVR: Failed to locate module
info:  Enabled instance extensions:
info:    VK_KHR_get_physical_device_properties2
info:    VK_KHR_surface
info:    VK_KHR_win32_surface
info:  AMD RADV POLARIS10 (LLVM 8.0.0):
info:    Driver: 19.0.4
info:    Vulkan: 1.1.90
info:    Memory Heap[0]: 
info:      Size: 7936 MiB
info:      Flags: 0x1
info:      Memory Type[0]: Property Flags = 0x1
info:    Memory Heap[1]: 
info:      Size: 256 MiB
info:      Flags: 0x1
info:      Memory Type[2]: Property Flags = 0x7
info:    Memory Heap[2]: 
info:      Size: 8192 MiB
info:      Flags: 0x0
info:      Memory Type[1]: Property Flags = 0x6
info:      Memory Type[3]: Property Flags = 0xe
info:  D3D11CoreCreateDevice: Probing D3D_FEATURE_LEVEL_11_0
info:  D3D11CoreCreateDevice: Using feature level D3D_FEATURE_LEVEL_11_0
info:  Enabled device extensions:
info:    VK_EXT_conditional_rendering
info:    VK_EXT_memory_priority
info:    VK_EXT_shader_viewport_index_layer
info:    VK_EXT_transform_feedback
info:    VK_EXT_vertex_attribute_divisor
info:    VK_KHR_dedicated_allocation
info:    VK_KHR_descriptor_update_template
info:    VK_KHR_driver_properties
info:    VK_KHR_get_memory_requirements2
info:    VK_KHR_image_format_list
info:    VK_KHR_maintenance1
info:    VK_KHR_maintenance2
info:    VK_KHR_sampler_mirror_clamp_to_edge
info:    VK_KHR_shader_draw_parameters
info:    VK_KHR_swapchain
warn:  DXVK: Updating state cache version to v4
info:  DXVK: Read 2186 valid state cache entries
warn:  DXVK: Creating new state cache file
info:  DXVK: Using 9 compiler threads
warn:  DXGI: VK_FORMAT_D24_UNORM_S8_UINT -> VK_FORMAT_D32_SFLOAT_S8_UINT
info:  Game: witcher3.exe
info:  DXVK: v1.1.1
warn:  OpenVR: Failed to locate module
info:  Enabled instance extensions:
info:    VK_KHR_get_physical_device_properties2
info:    VK_KHR_surface
info:    VK_KHR_win32_surface
info:  AMD RADV POLARIS10 (LLVM 8.0.0):
info:    Driver: 19.0.4
info:    Vulkan: 1.1.90
info:    Memory Heap[0]: 
info:      Size: 7936 MiB
info:      Flags: 0x1
info:      Memory Type[0]: Property Flags = 0x1
info:    Memory Heap[1]: 
info:      Size: 256 MiB
info:      Flags: 0x1
info:      Memory Type[2]: Property Flags = 0x7
info:    Memory Heap[2]: 
info:      Size: 8192 MiB
info:      Flags: 0x0
info:      Memory Type[1]: Property Flags = 0x6
info:      Memory Type[3]: Property Flags = 0xe
info:  Game: witcher3.exe
info:  DXVK: v1.1.1
warn:  OpenVR: Failed to locate module
info:  Enabled instance extensions:
info:    VK_KHR_get_physical_device_properties2
info:    VK_KHR_surface
info:    VK_KHR_win32_surface
info:  AMD RADV POLARIS10 (LLVM 8.0.0):
info:    Driver: 19.0.4
info:    Vulkan: 1.1.90
info:    Memory Heap[0]: 
info:      Size: 7936 MiB
info:      Flags: 0x1
info:      Memory Type[0]: Property Flags = 0x1
info:    Memory Heap[1]: 
info:      Size: 256 MiB
info:      Flags: 0x1
info:      Memory Type[2]: Property Flags = 0x7
info:    Memory Heap[2]: 
info:      Size: 8192 MiB
info:      Flags: 0x0
info:      Memory Type[1]: Property Flags = 0x6
info:      Memory Type[3]: Property Flags = 0xe
info:  Game: witcher3.exe
info:  DXVK: v1.1.1
warn:  OpenVR: Failed to locate module
info:  Enabled instance extensions:
info:    VK_KHR_get_physical_device_properties2
info:    VK_KHR_surface
info:    VK_KHR_win32_surface
info:  AMD RADV POLARIS10 (LLVM 8.0.0):
info:    Driver: 19.0.4
info:    Vulkan: 1.1.90
info:    Memory Heap[0]: 
info:      Size: 7936 MiB
info:      Flags: 0x1
info:      Memory Type[0]: Property Flags = 0x1
info:    Memory Heap[1]: 
info:      Size: 256 MiB
info:      Flags: 0x1
info:      Memory Type[2]: Property Flags = 0x7
info:    Memory Heap[2]: 
info:      Size: 8192 MiB
info:      Flags: 0x0
info:      Memory Type[1]: Property Flags = 0x6
info:      Memory Type[3]: Property Flags = 0xe
info:  Game: witcher3.exe
info:  DXVK: v1.1.1
warn:  OpenVR: Failed to locate module
info:  Enabled instance extensions:
info:    VK_KHR_get_physical_device_properties2
info:    VK_KHR_surface
info:    VK_KHR_win32_surface
info:  AMD RADV POLARIS10 (LLVM 8.0.0):
info:    Driver: 19.0.4
info:    Vulkan: 1.1.90
info:    Memory Heap[0]: 
info:      Size: 7936 MiB
info:      Flags: 0x1
info:      Memory Type[0]: Property Flags = 0x1
info:    Memory Heap[1]: 
info:      Size: 256 MiB
info:      Flags: 0x1
info:      Memory Type[2]: Property Flags = 0x7
info:    Memory Heap[2]: 
info:      Size: 8192 MiB
info:      Flags: 0x0
info:      Memory Type[1]: Property Flags = 0x6
info:      Memory Type[3]: Property Flags = 0xe
info:  D3D11CoreCreateDevice: Probing D3D_FEATURE_LEVEL_11_0
info:  D3D11CoreCreateDevice: Using feature level D3D_FEATURE_LEVEL_11_0
info:  Enabled device extensions:
info:    VK_EXT_conditional_rendering
info:    VK_EXT_memory_priority
info:    VK_EXT_shader_viewport_index_layer
info:    VK_EXT_transform_feedback
info:    VK_EXT_vertex_attribute_divisor
info:    VK_KHR_dedicated_allocation
info:    VK_KHR_descriptor_update_template
info:    VK_KHR_driver_properties
info:    VK_KHR_get_memory_requirements2
info:    VK_KHR_image_format_list
info:    VK_KHR_maintenance1
info:    VK_KHR_maintenance2
info:    VK_KHR_sampler_mirror_clamp_to_edge
info:    VK_KHR_shader_draw_parameters
info:    VK_KHR_swapchain
info:  DXVK: Read 2186 valid state cache entries
info:  DXVK: Using 9 compiler threads
warn:  DXGI: VK_FORMAT_D24_UNORM_S8_UINT -> VK_FORMAT_D32_SFLOAT_S8_UINT
warn:  DXVK: No matching border color found for (1e+10,1e+10,1e+10,1e+10)
info:  Presenter: Actual swap chain properties:
  Format:       VK_FORMAT_B8G8R8A8_UNORM
  Present mode: VK_PRESENT_MODE_IMMEDIATE_KHR
  Buffer size:  1920x1080
  Image count:  2
warn:  DXGI: MakeWindowAssociation: Ignoring flags
info:  Presenter: Actual swap chain properties:
  Format:       VK_FORMAT_B8G8R8A8_UNORM
  Present mode: VK_PRESENT_MODE_FIFO_KHR
  Buffer size:  1920x1080
  Image count:  3
002c:fixme:msvcrt:__clean_type_info_names_internal (0x53e6ac8) stub
002c:fixme:msvcrt:__clean_type_info_names_internal (0x587d298) stub
AL lib: (EE) ReleaseThreadCtx: Context 0x7e033910 current for thread being destroyed, possible leak!
AL lib: (EE) ReleaseThreadCtx: Context 0x7e033910 current for thread being destroyed, possible leak!
AL lib: (EE) ReleaseThreadCtx: Context 0x7de6d9c0 current for thread being destroyed, possible leak!
002c:fixme:msvcrt:__clean_type_info_names_internal (0x2431878) stub
002c:fixme:msvcrt:__clean_type_info_names_internal (0x135768) stub

Quoting: ArehandoroI have not started the game for a while and now, to my surprise, the game thinks it's a fresh installation. No saves at all nor the button to Continue appears. Has someone experienced something similar?

The game is storing its saves in:

<prefix>/drive_c/users/$USER/My Documents/The Witcher 3/gamesaves

if your documents association is disconnected from the desktop one (I always disconnect them all, to keep prefixes self contained). Otherwise it would store it in wherever your documents association points to (like $HOME/Documents and etc.). That can get reset in some cases due to this bug: https://bugs.winehq.org/show_bug.cgi?id=22974

However if that location already has some data, it shouldn't reset it.

So what I recommend doing is, find your old saves first and back them up to be sure. Then start a new game and make a new save. Check where it goes, and then replace it with old saves.

Check out these two mods: Friendly HUD and Friendly Meditation. I've tried both out and I've decided I won't play the game again unless I have both. Unfortunately I ran into a issue with both mods working at same time.
If you can get both working I'd appreciate if you let me know how. That said, I just wanted to share the mods with you. There is also a debug mod that can be used to pause game for better screenshots.

Friendly meditation is great, I'm using it as well. I haven't used friendly HUD though. The other mods I use are are More Quickslots and No Talk Icon. The later helps with immersion.

If some mods cause conflicts, it means they alter the same file. You need to merge their scripts using some merge tools.

Some ideas related to mods scripts merging are explained here:
https://www.nexusmods.com/witcher3/mods/484