Christoph, in the 4.17 cycle you submitted the patch "x86/dma: Use DMA-direct". This causes the VGA video on my laptop to stop working, but the system continues to be up and functioning. Video works until about 3/4 the way through boot, when I think it is loading a video driver, and then video hangs. I could ssh to it and the keyboard would respond to alt-sysrq commands.
Strangely, it started working again in the 4.20 cycle with the addition of Fenghua's patch "x86/cpufeatures: Enumerate MOVDIRI instruction". This is odd to me because it looks like a very simple patch. I only have CONFIG_VGA_CONSOLE, CONFIG_FRAMEBUFFER_CONSOLE and CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY enabled, with no hardware-specific framebuffer config option set. lspci -nn of my VGA adapter gives the following: 00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02) Your thoughts? How can I help debug this? Reported-by: Matthew Whitehead <tedheads...@gmail.com>
