default xorg screen resolution
brownh
that I didn't realize that xorg now automatically sets the screen
resolution without use of the Screen Section.
In a machine two years old running debian/lenny, with a MSI NX8500GT
512 Mb, 128 bit, GDDR2 graphics card and 21" LCD monitor, I had
defined a screen section, subsection, modes to be 1680x1050. Indeed, $
xrandr reports that current resolution is 1680x1050.
In a machine now being built, also running debian/lenny, with EGVA
512-P3-N871-AR GeForce 9800 GTX+ 512MB 256-bit GDDR3 video card and a
23" LCD monitor, the default screen section in xorg.conf does not specify
the mode. The monitor's optimal resolution is 1920 X 1080 @
60Hz. However, rather than getting this automatically, $ xrandr reports
that I'm currently running at a maximum resolution of 1280 x 1024.
Why am I getting lower max resolution with better hardware?
I'm tempted simply to write a mode subsection in the Screen Section to
force a 1920x1080 resolution. Any obvious reason I should not do this
as I've done before?
Haines Brown
Henrik Carlqvist
> The monitor's optimal resolution is 1920 X 1080 @ 60Hz. However, rather
> than getting this automatically,
My guess is that your DDC (also known as EDID) signals get lost somewhere,
maybe in a bad VGA cable, maybe in a KVM switch. The signals on pin 12 and
15 in the VGA cable are used to tell the graphics card about the monitors
capabilities.
If you can't get EDID to work you will probably have to resort to
hardcoding your resolution in xorg.conf.
regards Henrik
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brownh
> brownh <bro...@teufel.historicalMaterialism.info> wrote:
>> The monitor's optimal resolution is 1920 X 1080 @ 60Hz. However, rather
>> than getting this automatically,
>
> My guess is that your DDC (also known as EDID) signals get lost somewhere,
> maybe in a bad VGA cable, maybe in a KVM switch. The signals on pin 12 and
> 15 in the VGA cable are used to tell the graphics card about the monitors
> capabilities.
>
> If you can't get EDID to work you will probably have to resort to
> hardcoding your resolution in xorg.conf.
Henrik, I've found the problem. My xorg.0.log says that EDID has
modeline of 1920x1080, which seems to indicate that the proper
information regarding monitor capabilities is reaching the
computer. However, the highest mode listed in the log is 1280x1024,
which is what xrandr says is the current and maximum resolution.
A symptom not mentioned before is that the screen did not entirely
fill the monitor area, but had a black border around if of +/- 1".
If EDID is reporting correct information from the monitor, I inferred
that it was working. Since I had previously swapped cables, I decided
the graphics card might be at fault. I swapped it for a less expensive
card, and now I get the full 1920x1080 max/current resolution (higher
resolution than I will want to use) that fills all the monitor
available area. Being a less fancy card, it has no fan, and as a
result my computer is totally silent (I had swapped out the case fans
for fancy silent ones). A strange experience.
So I'll try to RMA the graphics card.
Thanks for the clues.
Haines
terryc
> Being a less fancy card, it has no fan, and as a result my
> computer is totally silent (I had swapped out the case fans for fancy
> silent ones). A strange experience.
What brand/model of fan?
T.I.A.
brownh
replaced them with three Scythe GentleTyphoon D1225C12B4AP fans. These
move a bit less air, but I accepted this because of their very low
noise level rating and because I don't do intensive computing. This
case is also noise insulated, and my ear has to be about 4" from the
closed case to hear any fan noise at all.
I overdid the CPU cooler because I got it at a very good price, and
replaced the one that came with my CPU with a Thermalright Ultra-120
eXtreme-775. It was a monster and I just barely got it into the
case. It has a 120mm fan that is also very quiet. Finally, for
whatever its worth, I have an Enermax MODU82+ EMD525AWT 525W ATX12V
Ver.2.3 power supply, and I don't think its fan makes any appreciable
noise.
This is the first time I troubled to replace case fans, but based on
the result I am likely to do it again. The Lian-Li case has a swinging
front door that I had disassemble in order to mount the fans, and I
had to add washer thickness spacing for the front fans to ensure the
fan hubs would not rub against the case. This made the installation a
bit more challenging.
Haines
Spamless
> Henrik Carlqvist <Henrik.C...@deadspam.com> writes:
>
>> brownh <bro...@teufel.historicalMaterialism.info> wrote:
>>> The monitor's optimal resolution is 1920 X 1080 @ 60Hz. However, rather
>>> than getting this automatically,
>>
>> My guess is that your DDC (also known as EDID) signals get lost somewhere,
>> maybe in a bad VGA cable, maybe in a KVM switch. The signals on pin 12 and
>> 15 in the VGA cable are used to tell the graphics card about the monitors
>> capabilities.
>>
>> If you can't get EDID to work you will probably have to resort to
>> hardcoding your resolution in xorg.conf.
>
> card, and now I get the full 1920x1080 max/current resolution (higher
> resolution than I will want to use) that fills all the monitor
> available area. Being a less fancy card, it has no fan, and as a
> result my computer is totally silent (I had swapped out the case fans
> for fancy silent ones). A strange experience.
What brand of cards and what drivers?
Fedora Core 9 (nv driver for onboard video) could not give me full
screen on my widescreen monitor. FC11 (nouveau driver) could.
The NVIDIA binary driver also works.
Do some drivers have greater capabilities (handle higher resolutions
than others)? If you switched drivers with the new card that might
explain being able to get higher resolution.