Hello kernel/driver developers,
I hope, with my information it's possible to find a bug/problem in the kernel. Otherwise I am sorry, that I disturbed you. I only use LTS kernels, but I can narrow it down to a hand full of them, where it works.
The PC: Manjaro Stable/Cinnamon/X11/AMD Ryzen 5 2600/Radeon HD 7790/8GB RAM I already asked the Manjaro community, but with no luck.
The game: Hellpoint (GOG Linux latest version, Unity3D-Engine v2021), uses vulkan
---
I came a long road of kernels. I had many versions of 5.4, 5.10, 5.15, 6.1 and 6.6 and and the game was always unplayable, because the frames where around 1fps (performance of PC is not the problem). I asked the mesa and cinnamon team for help in the past, but also with no luck. It never worked, till on 2025-03-29 when I installed 6.12.19 for the first time and it worked!
But it only worked with 6.12.19, 6.12.20 and 6.12.21 When I updated to 6.12.25, it was back to unplayable.
For testing I installed 6.14.4 with the same result. It doesn't work.
I also compared file /proc/config.gz of both kernels (6.12.21 <> 6.14.4), but can't seem to see drastic changes to the graphical part.
I presume it has something to do with amdgpu.
If you need more information, I would be happy to help.
Kind regards, Marion
On Thu, May 8, 2025 at 9:13 AM machion@disroot.org wrote:
Hello kernel/driver developers,
I hope, with my information it's possible to find a bug/problem in the kernel. Otherwise I am sorry, that I disturbed you. I only use LTS kernels, but I can narrow it down to a hand full of them, where it works.
The PC: Manjaro Stable/Cinnamon/X11/AMD Ryzen 5 2600/Radeon HD 7790/8GB RAM I already asked the Manjaro community, but with no luck.
The game: Hellpoint (GOG Linux latest version, Unity3D-Engine v2021), uses vulkan
I came a long road of kernels. I had many versions of 5.4, 5.10, 5.15, 6.1 and 6.6 and and the game was always unplayable, because the frames where around 1fps (performance of PC is not the problem). I asked the mesa and cinnamon team for help in the past, but also with no luck. It never worked, till on 2025-03-29 when I installed 6.12.19 for the first time and it worked!
But it only worked with 6.12.19, 6.12.20 and 6.12.21 When I updated to 6.12.25, it was back to unplayable.
Can you bisect to see what fixed it in 6.12.19 or what broke it in 6.12.25? For example if it was working in 6.12.21 and not working in 6.12.25, you can bisect between 6.12.21 and .25.
Alex
For testing I installed 6.14.4 with the same result. It doesn't work.
I also compared file /proc/config.gz of both kernels (6.12.21 <> 6.14.4), but can't seem to see drastic changes to the graphical part.
I presume it has something to do with amdgpu.
If you need more information, I would be happy to help.
Kind regards, Marion
Hi, sorry for the delay. Besides less time, I had to make myself familiar with bisecting and again kernel compiling. Last time I compiled the kernel myself was around 2010 I think.
Anyway it seems I found the bad commit. The result after bisecting 10 commits is:
a53d959fe660341788cb8dbc3ac3330d90a09ecf is the first bad commit commit a53d959fe660341788cb8dbc3ac3330d90a09ecf Author: Christian König christian.koenig@amd.com Date: Thu Mar 20 14:46:18 2025 +0100
drm/amdgpu: immediately use GTT for new allocations
commit a755906fb2b8370c43e91ba437ae1b3e228e8b02 upstream.
Only use GTT as a fallback if we already have a backing store. This prevents evictions when an application constantly allocates and frees new memory.
Partially fixes https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2833985.
Signed-off-by: Christian König christian.koenig@amd.com Fixes: 216c1282dde3 ("drm/amdgpu: use GTT only as fallback for VRAM|GTT") Acked-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
Marion
Am 2025-05-08 15:18, schrieb Alex Deucher:
On Thu, May 8, 2025 at 9:13 AM machion@disroot.org wrote:
Hello kernel/driver developers,
I hope, with my information it's possible to find a bug/problem in the kernel. Otherwise I am sorry, that I disturbed you. I only use LTS kernels, but I can narrow it down to a hand full of them, where it works.
The PC: Manjaro Stable/Cinnamon/X11/AMD Ryzen 5 2600/Radeon HD 7790/8GB RAM I already asked the Manjaro community, but with no luck.
The game: Hellpoint (GOG Linux latest version, Unity3D-Engine v2021), uses vulkan
I came a long road of kernels. I had many versions of 5.4, 5.10, 5.15, 6.1 and 6.6 and and the game was always unplayable, because the frames where around 1fps (performance of PC is not the problem). I asked the mesa and cinnamon team for help in the past, but also with no luck. It never worked, till on 2025-03-29 when I installed 6.12.19 for the first time and it worked!
But it only worked with 6.12.19, 6.12.20 and 6.12.21 When I updated to 6.12.25, it was back to unplayable.
Can you bisect to see what fixed it in 6.12.19 or what broke it in 6.12.25? For example if it was working in 6.12.21 and not working in 6.12.25, you can bisect between 6.12.21 and .25.
Alex
For testing I installed 6.14.4 with the same result. It doesn't work.
I also compared file /proc/config.gz of both kernels (6.12.21 <> 6.14.4), but can't seem to see drastic changes to the graphical part.
I presume it has something to do with amdgpu.
If you need more information, I would be happy to help.
Kind regards, Marion
On Fri, Jun 13, 2025 at 3:38 PM machion@disroot.org wrote:
Hi, sorry for the delay. Besides less time, I had to make myself familiar with bisecting and again kernel compiling. Last time I compiled the kernel myself was around 2010 I think.
Anyway it seems I found the bad commit. The result after bisecting 10 commits is:
a53d959fe660341788cb8dbc3ac3330d90a09ecf is the first bad commit commit a53d959fe660341788cb8dbc3ac3330d90a09ecf Author: Christian König christian.koenig@amd.com Date: Thu Mar 20 14:46:18 2025 +0100
drm/amdgpu: immediately use GTT for new allocations commit a755906fb2b8370c43e91ba437ae1b3e228e8b02 upstream. Only use GTT as a fallback if we already have a backing store. This prevents evictions when an application constantly allocates andfrees new memory.
Partially fixes https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2833985. Signed-off-by: Christian König <christian.koenig@amd.com> Fixes: 216c1282dde3 ("drm/amdgpu: use GTT only as fallback forVRAM|GTT") Acked-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
Unfortunately reverting that commit will reintroduce a similar performance issue for lots of other uses. See: https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2827990 for a description of the fundemental problem.
Alex
Marion
Am 2025-05-08 15:18, schrieb Alex Deucher:
On Thu, May 8, 2025 at 9:13 AM machion@disroot.org wrote:
Hello kernel/driver developers,
I hope, with my information it's possible to find a bug/problem in the kernel. Otherwise I am sorry, that I disturbed you. I only use LTS kernels, but I can narrow it down to a hand full of them, where it works.
The PC: Manjaro Stable/Cinnamon/X11/AMD Ryzen 5 2600/Radeon HD 7790/8GB RAM I already asked the Manjaro community, but with no luck.
The game: Hellpoint (GOG Linux latest version, Unity3D-Engine v2021), uses vulkan
I came a long road of kernels. I had many versions of 5.4, 5.10, 5.15, 6.1 and 6.6 and and the game was always unplayable, because the frames where around 1fps (performance of PC is not the problem). I asked the mesa and cinnamon team for help in the past, but also with no luck. It never worked, till on 2025-03-29 when I installed 6.12.19 for the first time and it worked!
But it only worked with 6.12.19, 6.12.20 and 6.12.21 When I updated to 6.12.25, it was back to unplayable.
Can you bisect to see what fixed it in 6.12.19 or what broke it in 6.12.25? For example if it was working in 6.12.21 and not working in 6.12.25, you can bisect between 6.12.21 and .25.
Alex
For testing I installed 6.14.4 with the same result. It doesn't work.
I also compared file /proc/config.gz of both kernels (6.12.21 <> 6.14.4), but can't seem to see drastic changes to the graphical part.
I presume it has something to do with amdgpu.
If you need more information, I would be happy to help.
Kind regards, Marion
I feared that.
It seems a crazy problem, when many people are affected and in opposite ways. This ReBAR/UEFI thing is also new to me, but I don't have this on my system either (using BIOS/MBR).
I hope, it can be fixed for all scenarios.
Marion
Am 2025-06-16 15:29, schrieb Alex Deucher:
On Fri, Jun 13, 2025 at 3:38 PM machion@disroot.org wrote:
Hi, sorry for the delay. Besides less time, I had to make myself familiar with bisecting and again kernel compiling. Last time I compiled the kernel myself was around 2010 I think.
Anyway it seems I found the bad commit. The result after bisecting 10 commits is:
a53d959fe660341788cb8dbc3ac3330d90a09ecf is the first bad commit commit a53d959fe660341788cb8dbc3ac3330d90a09ecf Author: Christian König christian.koenig@amd.com Date: Thu Mar 20 14:46:18 2025 +0100
drm/amdgpu: immediately use GTT for new allocations commit a755906fb2b8370c43e91ba437ae1b3e228e8b02 upstream. Only use GTT as a fallback if we already have a backing store.This prevents evictions when an application constantly allocates and frees new memory.
Partially fixeshttps://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2833985.
Signed-off-by: Christian König <christian.koenig@amd.com> Fixes: 216c1282dde3 ("drm/amdgpu: use GTT only as fallback forVRAM|GTT") Acked-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
Unfortunately reverting that commit will reintroduce a similar performance issue for lots of other uses. See: https://gitlab.freedesktop.org/drm/amd/-/issues/3844#note_2827990 for a description of the fundemental problem.
Alex
Marion
Am 2025-05-08 15:18, schrieb Alex Deucher:
On Thu, May 8, 2025 at 9:13 AM machion@disroot.org wrote:
Hello kernel/driver developers,
I hope, with my information it's possible to find a bug/problem in the kernel. Otherwise I am sorry, that I disturbed you. I only use LTS kernels, but I can narrow it down to a hand full of them, where it works.
The PC: Manjaro Stable/Cinnamon/X11/AMD Ryzen 5 2600/Radeon HD 7790/8GB RAM I already asked the Manjaro community, but with no luck.
The game: Hellpoint (GOG Linux latest version, Unity3D-Engine v2021), uses vulkan
I came a long road of kernels. I had many versions of 5.4, 5.10, 5.15, 6.1 and 6.6 and and the game was always unplayable, because the frames where around 1fps (performance of PC is not the problem). I asked the mesa and cinnamon team for help in the past, but also with no luck. It never worked, till on 2025-03-29 when I installed 6.12.19 for the first time and it worked!
But it only worked with 6.12.19, 6.12.20 and 6.12.21 When I updated to 6.12.25, it was back to unplayable.
Can you bisect to see what fixed it in 6.12.19 or what broke it in 6.12.25? For example if it was working in 6.12.21 and not working in 6.12.25, you can bisect between 6.12.21 and .25.
Alex
For testing I installed 6.14.4 with the same result. It doesn't work.
I also compared file /proc/config.gz of both kernels (6.12.21 <> 6.14.4), but can't seem to see drastic changes to the graphical part.
I presume it has something to do with amdgpu.
If you need more information, I would be happy to help.
Kind regards, Marion
linux-stable-mirror@lists.linaro.org
-
Alex Deucher -
machion＠disroot.org