So please bisect between 5.8 and 5.9.
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https://bugs.launchpad.net/bugs/1899304
Title:
Linux 5.4.0-48 (and later) causes GPU lockup, huge performance drop,
makes GNOME desktop fail to
So, the 5.4.0-48 error is the same as the one that appears with 5.9 (and
the one we see with PCI GPUs):
```
[0.00] Linux version 5.4.0-48-generic (buildd@lcy01-amd64-010) (gcc
version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #52-Ubuntu SMP Thu Sep 10 10:58:49 UTC
2020 (Ubuntu 5.4.0-48.52-generic
** Attachment added: "dmesg on Linux 5.4.0-48-generic on Ubuntu 20.04, K10
platform, ATI Radeon HD 4670 (truncated because it was weighting 62MB)"
Related and similar issue with PCI graphic cards (not AGP ones):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1902795
While PCI graphic cards are broken on AMD K8/K10 platform for years
(I've reproduced on Linux 4.4, 4.8 and 4.15 from Ubuntu 16.04 Xenial),
AGP cards started to break on
** Attachment added: "dmesg on Linux 5.10.0-051000rc1-generic on Ubuntu 20.04,
K10 platform, ATI Radeon HD 4670 AGP"
** Attachment added: "dmesg on Linux 5.9 vanilla on Ubuntu 20.04, K10 platform,
ATI Radeon HD 4670 AGP"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1899304/+attachment/5430874/+files/dmesg.ubuntu-20.04.linux-5.9-vanilla_ASRock-AM2NF3-VSTA+K10_ATI-Radeon-HD-4670-AGP.txt
--
You
For some reason I was able to compile v5.4 and v5.5 from torvalds
branchs with `make -j$(nproc) deb-pkg` but starting with v5.6 I had to
use `make -j$(nproc) bindeb-pkg`, in the end I lacked some modules (like
my network driver, that did not helped me) but radeon one was there so
tests could have
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1899304
Title:
Linux 5.4.0-48 (and later) causes GPU lockup, huge performance
I built the v5.5.0 version from torvalds's branch and it works.
So, if it does not work on Ubuntu's 5.4.0-48 I can assume it's was
broken by some Ubuntu custom patch or some backports, making it harder
for me to identify what may have introduced the regression.
I'll try to find the vanilla
Would it be possible for you to do a kernel bisection?
First, find the last -rc kernel works and the first -rc kernel doesn’t
work from http://kernel.ubuntu.com/~kernel-ppa/mainline/
Then,
$ sudo apt build-dep linux
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$
Hi, thank you for your answer and your attention,
This issue is confirmed again.
1. 5.10.0-rc1 does not fix the problem introduced in 5.4.0-48 regarding ATI/AMD
AGP GPU.
2. PCI GPUs are broken on AMD K8/K10 platform since years but they work on
Intel platform, GPU being ATI/AMD or Nvidia
I guess it's caused by commit "drm/radeon: disable AGP by default".
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.10-rc1/amd64/
Hopefully it's already fixed.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
--
You received this bug
Here is another photo of display glitch happening when the computer
hangs. I got it with both the Radeon X1950 and the Radeon HD 4670.
What happens it at startup, the GNOME Shell desktop makes an animation,
expanding itself from the center of the screen. In such screenshot, we
see the computer
I reproduce the bug on another computer, using 5.4.0-52-generic kernel:
Motherboard: Asrock AM2NF3 VSTA
CPU: AMD Phenom II X4 970 (Quad core)
RAM: 16GB DDR2 800MHz (4×4 GB)
GPU: ATI Radeon HD 4670 AGP
VRAM: 1GB DDR3
Of course the same computer works flawlessly with 5.4.0-47-generic
kernel.
I
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