how can i get dell 3008wfp to 2560x1600 resolution without glitches?
 

greetings, and welcome to digit's new dell monitor issue.


i have purchased a 2nd hand dell 3008wfp (and then a second one on the way too!)

i want to run it at max resolution of 2560x1600. so i have a {[dual]/ed}** dvi-i cable in {[one of my two short-form EVGA Nvidia GeForce 750]/ed}** , but cant get it to go above the 1920x1200 i can get with vga or hdmi, without it going glitchy.

sry i dont have easy means to take a picture of it here. but i'll go outta my way to get a picture of mine if it really is beneficial to diagnosis to see. (a scrot wont do, comes out flawless)

~~ seems similar enough to the problem this fella had:

https://www.reddit.com/r/linuxquesti..._at_2560x1600/

n so it looks kinda like:

http://i.imgur.com/igs4as1.jpg
~~

how can i get dell 3008wfp to 2560x1600 resolution without glitches? does it need more/different cables? different connector? some other kind of xorg wizardry? ok, i dont even know the possibilities im trying to ask... not knowing enough about the nature of my issue;.... so i'll just throw a pile of outputs out there...

xrandr (while in the glitchy full res)
i deleted my xorg.conf as it had gotten in a bigger mess from desperate fix attempts, so i got back into x avoiding a weird '1/4 is not a valid input device' or something that wouldnt go away, heh, n thus:
packages i currently have (or dont) relating to this. ~ had previously gone wild installing xorg stuff to remedy a prior issue, and have just recently gone around cleaning them up (may have missed bits, or maybe removed something important (doubt it).
and incase this gets relevant too...
.. have been trying to utilise cvt output...
however, when i try follow the steps to add the new res, and apply it, i come up short with the following probably important output:
and so i presume the following 'xrandr --addmode' is mute since --newmode talks so much of fail.


i tried addingin the Device section in a fresh empty xorg.conf. no apparent effect for me. 2560x1200 still looked like it was doubling half the pixels or whatever its doing.



what obvious output did i miss?

what obvious(-to-the-dvi-initiated) dvi-necessity am i missing?


any pointers welcome.
what silly obvious thing have i overlooked? what thing should i have known, n would have, had i been using dvi for the past decade instead of vga all this time? is it something i need to meddle with in bios? in grub?

i've spent too long on it already, n am just grinding my face off now. i need to take a step back.

:)

thnx in advance for any tips i'll find waiting for me upon my return with a fresh head.

how can i get dell 3008wfp to 2560x1600 resolution without glitches?




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ps, more outputs incase relevant/helpful.

lsmod
lspci
lshw -c display | grep driver
my last xorg error output
http://dpaste.com/095TYDF


pps, what is bumblebee* and do i need it for my hardware?

*ppps,
i'd prefer Free Software solutions if i can, but will succumb to proprietary where they're found too lacking.

** added details for better clarity. thnx responders.

What graphics card do you have?

The op said.

Do you have a single link or dual link DVI-I cable? I'm guessing single link, simply because a single link DVI-I's maximum supported resolution is, you guessed it, 1920x1200.

to identify:
Single Link DVI-I:
http://cdn.pcadvisor.co.uk/cmsdata/f...k_thumb800.jpg

Dual Link DVI-I:
http://forums.jeuxonline.info/attach...1&d=1401715663

You really should use Display Port or HDMI if possible, they support much higher resolutions.

thnx for responses.

full complement of pins. Dual Link DVI-I.

i thought hdmi maxed out at 1920x1200 (or something)... such is what i thought i had read, and am certain i experienced.

Display Port cable purchased/enroute (might be here tmro), n shall report here how well it does. max resolution 'should' be doable with dvi tho. no?

dual link, yes, your monitor is the max resolution for dual-link DVI.

HDMI 1.0 maxed at 1080p (or 1900x1200 for the not so widescreen format), but 2.0 maxes at 4K resolutions, and even 1.4 can do 4K resolutions, however only @ 30 Hz refresh rate.

yeah. that fits the picture so far.

the hdmi i tried is (i presume) very old, found burried in a drawer of other old wires n gubbins.

i had found some other tips to get this working in dvi, but they involved 30hz hacks, so i didnt try, as i'm not at all interested in that, n already consider 60 a compromise.

Meh, anything above 60 (consistently, not average) useless since the human eye can't detect anything that fast. 30 Hz is though, IMO, too much of a compromise.

Do these graphics cards have display port outputs?

Assuming his card is based on the reference design, no. Reference GTX 750 had 2 DVI (1 -I, 1 -D) and a HDMI.

How much RAM do these graphics cards have?

EVGA, 2gb each, DisplayPort=yes.




offtopic
as for the 30hz thing, even though this is the wrong thread for such a debate... it's not the eye that struggles to distinguish faster, it's the old notion of the flicker-rate of the mind.

the eye is indifferent, n will pick up far far faster before the photoreceptivity of the cells in our eyes starts tripping up over itself.

wave your fingers infront of the screen n tell me 30 is same as 60, and 60 is same as faster. maybe you cant tell the difference, maybe your monitor blurs the frames together with ghostly afterglow unresponsiveness. i can tell the difference, even if i couldnt directly, even subconsciously, i would still tell by the headaches. n certainly noticeable in intense moments of gaming (or other intense moments... but gaming is most likely when it comes to having intense moments looking at a monitor) where the flicker-rate of the mind may become stretched, not just consciousness observing the flicker rate, but actually changing the flicker rate (like bruce lee famously spoke of in an interview).

I think you need a graphics card with more RAM.

Display Port doesnt seem to work, at least, not plug n play. ~ wanna see how well it manages after a reboot with just display port connected.

maybe got a duff connection on this second hand monitor. ~ need to test cable still

poor first impression of display port. ~ just taking note of all that before zzz

Nvidia GeForce GTX 750 Ti,
Max Analog: 2048x1536
Max Digital: 4096x2160

i can make it do higher res with dvi [edit](with other screen off to the side in nvidia-settings)[/edit], but it doesnt make the actual visable res bigger than 1920x1200 (i think), just makes the desktop bigger off past the edges of what's visable on the monitor. ... this what it means by analogue n digital? or can my card actually do this properly, within its max digital resolution, but have it fit the monitor? or... is this it, the hard max limit and i should just make myself a 2048x1536 n be happy with that as max with this card? ... not happy, not gonna b happy with that.

so i should look for a gfx card with max analogue res of 2560x1600 or greater if i want this to work?

looking around for "Max Analog: 2560x1600", seems i need an older card with less ram (9900gtx seemingly the best on offer). o_O what madness is this? it was already painful enough giving up my superb two 7800GTX for an inferior chip, just to get some necessary "feature" needed to play my doze game i got the upgrades for. lol.

rather maddening that gpuboss doesnt show these important stats, analogue and digital resolutions.
i wonder if there's a comparison site, or somewhere that lists this so i could find the best suitable card... assuming this "max analogue res" is my issue.