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TheLexx
Tux's lil' helper
Tux's lil' helper


Joined: 04 Dec 2005
Posts: 84
Location: Austin Tx

PostPosted: Sat Dec 29, 2012 2:57 am    Post subject: Xorg screen dimming Reply with quote

I am having a problem with my video becoming dim. I am using xorg-server v1.12.2 . The problem happens when I use ctrl-alt-function to switch between text displays and the running X server. When I return to the X server, the brightness of my screen is reduced by about half, making it hard to read. The same problem happens if I start a game that uses SDK. The screen goes dim as soon at the program starts.

Once the video goes dim, switching back and forth with ctrl-alt-function does not fix the problem. The only way I have to fix it is to close my desktop (enlightenment) (thereby shutting down X), and then restarting the desktop with startx. I also found that programs such as games that use SDK also cause the dimming.

The problem only occurs on my computer with ATI mb-video. If I move the hard drive to a different computer with a pci-e video card, there is no problem. Nor do I have a problem with the mb-video computer when I use an old (over 2 years) X server.

I posted the complete /var/log/Xorg.0.log at http://pastebin.com/35X42Axp .

The only new information that is added when I ctrl-alt-function is a single line ...

[863887.601] (II) VESA(0): Setting up VESA Mode 0x118 (1024x768)


Any ideas?
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chithanh
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Developer


Joined: 05 Aug 2006
Posts: 1559
Location: Berlin, Germany

PostPosted: Mon Dec 31, 2012 6:07 pm    Post subject: Reply with quote

Why do you use such an old kernel, and the vesa driver instead of xf86-video-r128?
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TheLexx
Tux's lil' helper
Tux's lil' helper


Joined: 04 Dec 2005
Posts: 84
Location: Austin Tx

PostPosted: Tue Jan 01, 2013 5:21 pm    Post subject: Reply with quote

chithanh wrote:
Why do you use such an old kernel, and the vesa driver instead of xf86-video-r128?


Since I do not have any new hardware, I would prefer to use a "long term stable" kernel. I am also writing my own "devfs rules" rather than using the auto created ones. Once I clear up some things with my "devfs rules" I will switch to a newer "long term stable" kernel.

I tried using the xf86-video-r128 driver, but there was some sort of bug where it would not work with the mobo-video. The driver got into some sort of infinite loop where it kept trying and failing at the same thing over and over. When I used an older version of Gentoo 2010/2008(I don't remember when) it did not even attempt to load the r128 driver, so I switched to driver I had used before. I'm not sure if I have a log, from the r128 bug.
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chithanh
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Joined: 05 Aug 2006
Posts: 1559
Location: Berlin, Germany

PostPosted: Tue Jan 01, 2013 5:33 pm    Post subject: Reply with quote

If I had to guess, I would say that it is a combination of kernel, xorg-server, and xf86-video-vesa/r128 issues. Especially if you use vesafb or atyfb (can be checked by running "cat /proc/fb").

I would start with disabling any fb drivers first, and then upgrading your kernel.
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TheLexx
Tux's lil' helper
Tux's lil' helper


Joined: 04 Dec 2005
Posts: 84
Location: Austin Tx

PostPosted: Tue Jan 01, 2013 7:13 pm    Post subject: Reply with quote

[quote="chithanh"]If I had to guess, I would say that it is a combination of kernel, xorg-server, and xf86-video-vesa/r128 issues. Especially if you use vesafb or atyfb (can be checked by running "cat /proc/fb").

I would start with disabling any fb drivers first, and then upgrading your kernel.[/quote]

Thanks, I think i will try to resolve this using the xorg mailing list.
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