Hi Resolution CrunchBang

Creizai · 2012-08-02 14:33:52

I"ve got crunchbang installed on my Asus 1005HAB, and I'm really enjoying it. Well after messing with Fedora 17, I thought apt-get was easier for me to learn than yum for now, and I love the look and feel of openbox. I have a dell U2711 monitor with 2650 x 1440 but I can't use those settings have you guys figured out how to let crunchbang suport that hi of a resolution?

Thanks!

ivanovnegro · 2012-08-02 23:47:10

We need your hardware specs:

lspci | grep VGA

e.g. You could also use xrandr to adjust your resolution.

Meanie · 2012-08-03 21:35:12

i face the same issue at netbook Samsung N102s

My VGA details is :

00:02.0 VGA compatible controller: Intel Corporation Cedarview Integrated Graphics Controller (rev 09)

Last edited by Meanie (2012-08-03 21:35:42)

pidsley · 2012-08-03 21:40:46

Then as Ivan said we need to see output of

xrandr

(edit) wait a minute, you have a netbook, and you want to run it at 2650x1440?

Last edited by pidsley (2012-08-03 21:41:26)

ivanovnegro · 2012-08-03 21:47:44

Cedarview does not sound nice:

http://crunchbanglinux.org/forums/topic … esolution/

pvsage · 2012-08-04 00:42:41

pidsley wrote:

(edit) wait a minute, you have a netbook, and you want to run it at 2650x1440?

Nothing wrong with this AFAIK; I would regularly use my Dell Mini with a 1080p monitor with no problems, and 1440 isn't much higher than this.

pidsley · 2012-08-04 00:57:55

OK, I didn't understand it was going to an external monitor smile I was trying to picture a tiny screen at that resolution smile

Creizai · 2012-08-09 06:21:24

lspci | grep VGA

03:00.0 VGA compatible controller: nVidia Corporation GF100 [GeForce GTX 470] (rev a3)

Creizai · 2012-08-09 06:22:24

Maybe I'm using xrandr wrong but it says not a value I can enter when I go with 2650x1440.

pvsage · 2012-08-09 06:27:25

Have you posted the output of `xrandr`? If not, would you please? This will help us help you.

Creizai · 2012-08-10 16:01:21

xrandr: Failed to get size of gamma for output default
xrandr

Screen 0: minimum 640 x 480, current 1600 x 1200, maximum 1600 x 1200
default connected 1600x1200+0+0 0mm x 0mm
   1600x1200       0.0* 
   1280x1024       0.0  
   1280x800        0.0  
   1024x768        0.0  
   800x600         0.0  
   640x480         0.0

mikko.rantalainen · 2012-09-05 06:22:36

pvsage wrote:

pidsley wrote:
(edit) wait a minute, you have a netbook, and you want to run it at 2650x1440?
Nothing wrong with this AFAIK; I would regularly use my Dell Mini with a 1080p monitor with no problems, and 1440 isn't much higher than this.

Unfortunately, there's worlds of difference between 1080p and 2650x1440. The major problem is that single-link DVI has maximum resolution of 2048x1536@60Hz. Although VGA has no absolute upper limit (because it's using analog signaling) the practical upper limit is around 2048x1600@60Hz, which again falls short for 2650x1440@60Hz. If you can get your graphics adapter to output VGA 2650x1440@60Hz, it might work. However, do not expect to see stable image. That resolution requires *very* high pixel clock and as a result, individual pixels will shake all the time with VGA signaling. In addition, because of the very high pixel clock, the monitor will have hard time syncing the signal. Expect to lose the image every time the connector or cable moves even a bit. For the Dell U2711, I believe the maximum resolution that will sync with VGA connector is 2048x1152@60Hz. Again, this is the hardware limit and if your GPU drivers are not top-notch, real world limits could be lower.

In practice, 2650x1440@60Hz requires dual-link DVI, DisplayPort or (theoretically) HDMI 1.4a signaling. I'm not aware of any intel chipset supporting dual-link DVI so you'll need DisplayPort if you're using intel GPU. I'm pretty sure there's no real world GPU+display combination that would do 2650x1440@60Hz over HDMI. Most Radeon GPUs support dual-link DVI. And if you have DisplayPort connector, you should be safe, but I'm pretty sure you don't have one.

If your best digital output connector is a single-link DVI, the best display resolution you can use with real world displays is 1920x1200@60Hz. In that case, I'd suggest something like HP ZR2440w or Dell U2412M instead of Dell U2711. Obviously, the Dell U2711 is a better display but if you cannot run it pixel perfect, you're just wasting money. Pixel perfect 24" 16:10 beats non-pixel-perfect 27" 16:9 display every time.

mikko.rantalainen · 2012-09-05 07:10:29

mikko.rantalainen wrote:

In practice, 2650x1440@60Hz requires dual-link DVI, DisplayPort or (theoretically) HDMI 1.4a signaling.

After reading another discussion (http://forums.whirlpool.net.au/forum-re … &p=6&#r108) I now think that HDMI 1.3 is enough for 2650x1440@60Hz if both GPU and monitor support 10Gbps link. However, the Dell U2711 seems to only include 165MHz TMDS electonics and as such, the maximum resultion over HDMI is 2650x1440@35Hz. It's technically possible to use 16 bit colors and increase the refresh rate but I would rather have better colors with lower refresh rate.

That same thread claims that somebody had Dell U2711 running 2650x1440@60Hz (with 24 bit colors). If that is really true, the 165MHz TMDS electronics limit could be cased by the GPU/graphics adapter in most cases. Note that 165MHz TMDS is enough to comply with HDMI 1.4 and the higher 340MHz TMDS electronics is purely optional (the 340MHz is upper limit of the spec, not lower limit). Both the monitor and graphics adapter must support the higher clock for it to be of any use. You need to use HDMI 1.3 Category 2 cables or better for 340MHz TMDS signaling. HDMI 1.4 does not bring anything over HDMI 1.3 for the maximum signaling speeds, it only officially allows higher resolutions with lower refrest rates (http://en.wikipedia.org/wiki/Hdmi#Version_comparison).

Creizai · 2012-10-29 20:25:55

I'm running 2650 x 1440 on windows 7 just fine on my desktop which includes
Intel Core I7 930 @ 2.80ghz
16.0 GB Ram
470GTX ( 2 x DVI Output ports)
DVI cord connting to
Dell U2711 @ 2650 x 1440

Kind of gave up, but I'm willing to pop in my live cd again to get it running. Would love to dual boot

Last edited by Creizai (2012-10-29 20:34:42)

mikko.rantalainen · 2012-10-30 06:54:03

Creizai wrote:

I'm running 2650 x 1440 on windows 7 just fine on my desktop [...]
470GTX ( 2 x DVI Output ports)
DVI cord connting to
Dell U2711 @ 2650 x 1440

I'd bet that you're using dual-link DVI cable.

I'm running Dell U2711 connected to Radeon HD6450 with a dual-link DVI cable and I only have Core 2 dual core CPU and 8 GB of SDRAM. I'm running Ubuntu 12.04 LTS 64 bit with fully open source drivers ("Gallium 0.4 on AMD CAICOS") and the only minor problem is that both Unity and Cinnamon desktop visual effects lag a bit because the GPU is so slow (maximum full screen render rate is 45 fps and it only gets slower if graphics are even a bit demanding). AMD closed source drivers are of no use with this hardware (both buggier and slower than open source drivers).

I'd suggest getting a bit faster GPU than mine if you want to use Radeon based card. As far as I know, Radeon based cards have much better open source Linux drivers than anything offered by nVidia. Be warned though, that you practically cannot use Radeon closed source drivers with Ubuntu because those are too buggy (expect to get lots of random crashes and GPU lock ups).

The point of my writing above was that despite the fact that Dell U2711 does have HDMI connector, you should not expect to run 2650x1440@60Hz over any HDMI wire. Dual-Link DVI should be always okay. If you're not sure if your DVI cable is single-link or dual-link, check the diagram from wikipedia: http://upload.wikimedia.org/wikipedia/c … _Types.svg

You want DVI-I (Dual Link) or DVI-D (Dual Link) cable and any compatible graphics adapter. Pretty much every graphics adapter with a DVI connector supports dual link DVI except anything made by Intel. I guess Intel is trying to push DisplayPort instead (which is actually better if both your monitor and GPU supports it).

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#1 2012-08-02 14:33:52

Hi Resolution CrunchBang

#2 2012-08-02 23:47:10

Re: Hi Resolution CrunchBang

#3 2012-08-03 21:35:12

Re: Hi Resolution CrunchBang

#4 2012-08-03 21:40:46

Re: Hi Resolution CrunchBang

#5 2012-08-03 21:47:44

Re: Hi Resolution CrunchBang

#6 2012-08-04 00:42:41

Re: Hi Resolution CrunchBang

#7 2012-08-04 00:57:55

Re: Hi Resolution CrunchBang

#8 2012-08-09 06:21:24

Re: Hi Resolution CrunchBang

#9 2012-08-09 06:22:24

Re: Hi Resolution CrunchBang

#10 2012-08-09 06:27:25

Re: Hi Resolution CrunchBang

#11 2012-08-10 16:01:21

Re: Hi Resolution CrunchBang

#12 2012-09-05 06:22:36

Re: Hi Resolution CrunchBang

#13 2012-09-05 07:10:29

Re: Hi Resolution CrunchBang

#14 2012-10-29 20:25:55

Re: Hi Resolution CrunchBang

#15 2012-10-30 06:54:03

Re: Hi Resolution CrunchBang

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