David C. Rankin wrote:
On 06/03/2018 07:15 AM, Per Jessen wrote:
Uh, it works on some machines, not all. I wonder if it might be dependent on the graphics driver.
It shouldn't be, IIRC we are talking vesafb by default. Even when using one of the extended resolutions for the console. I know the X side will depend on the graphics card and EDID monitor info, but as long as the card does vesa, then the console frame-buffer shouldn't care.
I have a Dell Poweredge T610 that uses an onboard VGA card. It doesn't talk VESA nor does it activate power-saving on the monitor it came with (a 16:9 LCD with HDMI inputs only -- they had to include an HDMI->VGA adapter with the system -- also the graphics card is only capable of 4:3 (and one 5:4) ratios. If you want full color you are limited to 1024x768. The 1280x1024 mode only is capable of 16-bit color. It doesn't perform well as a frame-buffer device, so it stays in its native VGA mode where it gets assist from HW scrolling. Trying to boot a standard suse system make the monitor go blank as soon as it hits the video driver in the booting kernel. First output I can see, *if* it boots is the login prompt. It was very hard to debug, as I kept adding debug code to the disk boot process -- found out later that it had been booting from a premade ramdisk, so any fixes or debugging I tried was moot. To further complicate matters, I think the boot loader had been changed away from lilo at the same time. Lovely coinciding of perplexing issues that I knew nothing about. Anyway -- I thought VGA supported power-saving (?) but maybe not? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org