With multiple monitors (one vertical), some of the wallpaper is displayed where it shouldn't be

[vinnydiehl]

It is almost as if the vertical monitor were rotated back horizontally, and laid out in the upper left corner of the image behind the screenshot, a portion of it spilling into what should be the top "black bar".

I am on Arch with awesomewm. Wallpapers are being set with feh- two different images, one of which is actually rotated vertically, no funny business there.

[N-R-K]

Some screenshots/pictures of the problem might be helpful.

(But I don't use multi-monitor, so someone who actually uses multi-monitor will need to step up to contribute a fix most likely.)

[vinnydiehl]

Screenshot is attached above. :) This is the affected area:

Expected: that area is all black.

If you have any theories as to what the problem might be, I can give it a stab when I get some time. How are the screens composed onto the final image?

[N-R-K]

No theories as of now, but I think this is all the multimonitor related code:

scrot/src/scrot.c

Lines 893 to 923 in 724efba

	static Imlib_Image scrotGrabShotMonitor(void)
	{
	int eventBase, errBase;
	if (!XineramaQueryExtension(disp, &eventBase, &errBase))
	errx(EXIT_FAILURE, "Xinerama extension not found");
	int numScreens = 0;
	XineramaScreenInfo *screens = XineramaQueryScreens(disp, &numScreens);
	if (!screens && !numScreens)
	errx(EXIT_FAILURE, "Xinerama not active");
	if (!numScreens)
	errx(EXIT_FAILURE, "Xinerama active but did not find any output device");
	if (opt.monitor >= numScreens)
	errx(EXIT_FAILURE, "monitor %d not found", opt.monitor);
	XineramaScreenInfo *mon = &screens[opt.monitor];
	/* Hack: pretend we were invoked in autoselect mode */
	opt.autoselectX = mon->x_org;
	opt.autoselectY = mon->y_org;
	opt.autoselectW = mon->width;
	opt.autoselectH = mon->height;
	XFree(screens);
	return scrotGrabAutoselect();
	}

I don't really have any experience with Xinerama - but at a glance the code looks OK. But then I see that there's a Hack: comment in there :) So that's probably a good place to start investigating.

[N-R-K]

And btw, what was the full scrot command that you used to take the screenshot. It would probably be useful for anyone trying to reproduce the issue.

[vinnydiehl]

It was just a raw scrot command (well, specifically scrot -e 'mv $f ~/pictures/screenshots 2>/dev/null' as an awesome keybind but I can't imagine -e with a mv is breaking this). To expand on what I tried to explain in my initial post, you see how it appears as though it is rendering the background image in its original orientation at 0,0?

That might be a clue.

Another detail about my environment that may or may not be of importance: I'm running Arch as a VMware guest.

Also, would you believe it, I am no longer able to reproduce this at all. Just took a screenshot across all 3 monitors and it looks fine. Maybe it will come back after a reboot; or, maybe this was fixed with the update which hit the Community repo on 4/11 (a day before I posted this issue, not 100% sure if I had updated yet or not). I will investigate deeper in the coming days and will close this if I'm unable to get this to resurface. This has been a problem for some time before I reported it, so I'd be pleasantly surprised if it suddenly vanished for good. Nah, it's back after a reboot. I've been rather busy, but I will dive deeper into this when I have the time. If anyone else wishes to jump in and get the ball rolling, I'd appreciate that and would be happy to collaborate on your fork.

[wsslfnstr]

Is this the same problem?
I have 2 displays in vertical mode but there is a black bar between the screens.

The white part is the page. The black and gray is not there on the displays