Re: inexplicable fallback mode used when preferred mode 2560x1080 not supported by connection

2017-02-13 Thread Felix Miata 

Adam Jackson composed on 2017-02-13 11:27 (UTC-0500):


On Sun, 2017-02-12 at 05:10 -0500, Felix Miata wrote:



http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-big31-ostw-d2913wm.txt is
Xorg.0.log plus output from inxi -c0 -G, hwinfo --gfxcard and xrandr from a
GT210[1] on host big31 booted to openSUSE Tumbleweed and modesetting driver,
which falls to 1400x1050 using an HDMI cable. Using instead nouveau, fall is to
1152x864, same as same PC booted to openSUSE 42.1 using HDMI and modesetting
driver, and same PC booted to Fedora 25 using HDMI and nouveau driver.



Can you add Option "ModeDebug" "true" to your Device section in
xorg.conf and give the log from that?




http://fm.no-ip.com/Tmp/Linux/Xorg/get-edid-big41-d2913wm-hdmi-deb9.txt is the 
output from 'get-edid | parse-edid' running TDE on Sid fallen back to 1152x864 
mode using modesetting driver and HDMI on Intel gfx host big41, where mode 
details for 0 and 17 are conspicuously absent.


http://fm.no-ip.com/Tmp/Linux/Xorg/get-edid-big41-d2913wm-vga-deb9.txt is the 
output from 'get-edid | parse-edid' running TDE on Sid running native mode 
2560x1080 using modesetting driver and VGA on Intel gfx host big41, where 
extension block is conspicuously absent, and output sharpness is very poor 
compared to same display running 2560x1080 via either DVI or DisplayPort inputs.

--
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/
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Re: inexplicable fallback mode used when preferred mode 2560x1080 not supported by connection

2017-02-13 Thread Adam Jackson 
On Sun, 2017-02-12 at 05:10 -0500, Felix Miata wrote:

> http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-big31-ostw-d2913wm.txt is 
> Xorg.0.log plus output from inxi -c0 -G, hwinfo --gfxcard and xrandr from a 
> GT210[1] on host big31 booted to openSUSE Tumbleweed and modesetting driver, 
> which falls to 1400x1050 using an HDMI cable. Using instead nouveau, fall is 
> to 
> 1152x864, same as same PC booted to openSUSE 42.1 using HDMI and modesetting 
> driver, and same PC booted to Fedora 25 using HDMI and nouveau driver.

Can you add Option "ModeDebug" "true" to your Device section in
xorg.conf and give the log from that?

- ajax
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inexplicable fallback mode used when preferred mode 2560x1080 not supported by connection

2017-02-12 Thread Felix Miata 
Since acquiring my 2560x1080 U2913WM Dell for use among several multiboot PCs, 
with AMD/ATI, Intel and NVidia gfxchips represented, I'm frequently annoyed by 
lack of support for native mode by the cable actually connected, not so much by 
the lack of support itself as by the mode fallen back to. In most cases, the 
fallback selected is either 1400x1050@75 or 1152x864@75, while if using a VGA 
connection, 2560x1080 is supported for every PC and gfxchip I've tried so far.


http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-big31-ostw-d2913wm.txt is 
Xorg.0.log plus output from inxi -c0 -G, hwinfo --gfxcard and xrandr from a 
GT210[1] on host big31 booted to openSUSE Tumbleweed and modesetting driver, 
which falls to 1400x1050 using an HDMI cable. Using instead nouveau, fall is to 
1152x864, same as same PC booted to openSUSE 42.1 using HDMI and modesetting 
driver, and same PC booted to Fedora 25 using HDMI and nouveau driver.


Obviously the display isn't likely capable of any less than 1920x1080 via HDMI, 
because Intel gfx host big41 booted to Debian does it:

http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-big41-deb0-d2913wm.txt
OTOH, this installation when I try to use xrandr in startup script to get 
2560x1080 via HDMI also produces instead 1152x864. :-(


Why isn't the fallback only to 1920x1080 instead of all the way back to a much 
less appropriate and anachronistic 4:3 mode? How can I determine whether the 
fault is driver(s), Xorg, Display or Gfxchip? Is an Xorg bug filing at 
freedesktop.org indicated here? Could more elaborate xrandr on startup or 
xorg.conf produce 1920x1080 in these cases?


[1] http://www.evga.com/products/product.aspx?pn=01g-p3-1312-lr
--
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/
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