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On 07.12.2017 16:33, Alexandre Rossi
wrote:
(please CC me as I am not subscribed to the list) Hi, I am experiencing on-screen artifacts (red dots) when running at 1920x1080 on HDMI out. I've ruled out a hardware (cable, TV or GPU) issue by installing win10 which does not show those problems. This is by using stretch, issue occurs with both kernel 4.9 or 4.13 available in the backports. The hardware is intel HD 630 (Kaby Lake). Xorg uses the modeset driver. I was wondering where to get help regarding whether this is a bug : - xorg? - kernel i915? - kernel drm? - other component? Thanks, Alex A screenshot would be helpful. Does these artifacts appear every
single time or sporadically? I'd suggest to check RAM first of all with `memtest86+` and let
it run overnight. Not sure if test will get into memory area used
as video memory though. There was a microcode bug discovered recently in Kabylake-Skylake
CPUs. It causes memory corruption if I remember it correctly. It
could be fixed for certain CPUs by updating firmware for your
motherboard or installing "intel-microcode" package. It could be
the cause for your issue.
-- With kindest regards, Alexander. ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org ⠈⠳⣄⠀⠀⠀⠀ |