fyi:
https://www.phoronix.com/scan.php?page=news_item=Linux-5.2-AMD-Intel-
Laptops
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https://bugs.launchpad.net/bugs/1776563
Title:
Acer Aspire A315 IOAPIC failure on
Ubuntu 19.04 comes with kernel 5.0
see:
https://en.wikipedia.org/wiki/Ubuntu_version_history#Ubuntu_19.04_(Disco_Dingo)
I have tested with 5.1
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The parameters mentioned in comment 445 are working for me.
Acer Aspire A315-41 (with only a internal GPU).
Bios 1.11
Linux Mint 19.1
Kernel 5.1 rc
Suspend/resume work.
sensors command shows ~41 degree idle temp.
Thx!
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What is the issue with the touchpad?
I have not recognized anything with it...
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Title:
Acer Aspire A315 IOAPIC failure on Ubuntu
I have a Acer Aspire A315, and I was glad that the BIOS 1.15 fixed the
problems with the boot, and the WA kernel parameters were not needed
anymore. But now I have I have the next problem:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
amdgpu/+bug/1861925
Is this known for you?
I have tried the the points 1-16 in the document
https://wiki.ubuntu.com/Kernel/Debugging/Backlight
but I think in the latest kernel (5.5++) some parameters are removed.
https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
Point 10: use_bios_initial_backlight is not found
So the backlight is set to 255 most of the time (because with that value it is
stable)...
I have pressed the decrease and increase backlight buttons some times:
arg4 is different...
arg5 is 0x0 here too...
Aspire-A315-41:~$ sudo kprobe-perf 'p:dce_abm_set_backlight_level_pwm $arg1
$arg2
As I told I have an other similar laptop with discrete GPU:
Product Name : Aspire A315-41G
With cpu:
model name : AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx
It works.
I'm attaching the fwts output just now...
The command sudo kprobe-perf 'p:dce_abm_set_backlight_level_pwm $arg1
lspci -vvnn
from Product Name : Aspire A315-41
model name : AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx
Where the brigthness controll does not work
** Attachment added: "lspci_vvnn_a315_41.out"
lspci -vvn
from the a315-41G (where the brightness controll works)
** Attachment added: "lspci_vvnn_315_41G.out"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861925/+attachment/5336283/+files/lspci_vvnn_315_41G.out
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fwts output from Product Name : Aspire A315-41G with
cpu model name : AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx
** Attachment added: "fwts-a315-41G"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861925/+attachment/5336271/+files/fwts_results.log
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Thank You for your support, I have tried the 5.7.rc1, but without
success.
Then I have sent the laptop back to ACER, they have found a HW
Failure...
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I'm using stock Ubuntu _Mate_ 19.10. Do you think that some other Ubuntu
derivate would be OK?
I have tried the stock kernel 5.3, 5.5, 5.6rc1. I will just try your
kernel! Thanks!
Some more infos:
-if the brightness == max_brightness => the display is at max brightness but it
does not flash.
So I have tested your custom kernel. It does not fix my problem:
-if the brightness == max_brightness => the display is at max brightness but
stable.
-if the brightness < max_brightness => the display brightness is not stable (is
flashing). the brightness is jumping back and fort on the value
uname -a:
Linux Aspire-A315-41 5.6.0-rc5-custom #8 SMP Tue Mar 10 04:01:57 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
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