About two months ago, I got myself a full-HD LED monitor. I've been running it on a DVI port until several days ago, and everything has been working perfectly. But now I bought a HDMI cable, and switched my PC and monitor to use it via the HDMI ports. Although in essence it's working, there's one little problem; Instead of going in standby mode, the monitor prints a "no signal" message and soon shuts itself down. Whenever I get back, I have to manually power it on again.
I looked through the monitor's settings menus, but haven't found anything in this sense. Even if I turn power saving off or specify "PC mode" the issue takes place. My monitor is an LG 24EN43, and this is where I bought it from which also lists its specifications in more detail. My video card is a Radeon HD 6870. I'm running openSUSE 13.1 x64 Linux with KDE 4.13.2, and the free video drivers shipped with my distro (Gallium / MESA). Like I said, the problem doesn't happen via DVI, and only on HDMI.
Any suggestion is welcome, but please keep from pointing out the obvious and suggesting I switch back to DVI. Although DVI and HDMI quality is reported to be the same, I'd like to stick with the HDMI cable. Apart from offering more settings in the monitor's menus, the image quality does feel a little bit better for some strange reason. That and, considering my current financial situation, I didn't pay for a cable just to put it in a shelf and leave it there. If there's really no way at all to fix monitor standby with HDMI, I might or might not consider switching back to DVI, but I'm only curious if there is a solution or not.