I experienced these graphical glitches on my Dell E7270 (with HD
Graphics 520) and "intel_iommu=igfx_off" appears to have cured them.
But noting that I only ever saw the glitches very occasionally (maybe
once every few hours) and couldn't reliably reproduce. In any case, I've
used the system for a few hours after rebooting with
"intel_iommu=igfx_off" and have not observed any glitches.
Thanks all!
$ lspci -nnk | grep -A3 VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake GT2 [HD
Graphics 520] [8086:1916] (rev 07)
DeviceName: Onboard IGD
Subsystem: Dell Skylake GT2 [HD Graphics 520] [1028:06db]
Kernel driver in use: i915
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https://bugs.launchpad.net/bugs/2062951
Title:
Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu
24.04)
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