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post #6171 of 7922
Use the presets. I set 3 for ULMB, cursor, and 100% brightness. 2 with no ULMB, no cursor, and 45% brightness.
post #6172 of 7922
Quote:
Originally Posted by nefrusy View Post

I could be wrong, but I think the monitor secretly keeps track of two brightness settings. For example, if you are at 25 brightness and turn on ULMB for the first time, it secretly is using 100 brightness for ULMB mode. When you go to the brightness setting, it might show 25 still, but if you adjust it up or down, the brightness will suddenly drop off sharply because it actually changes from 100 down to 24/26.

If I'm right about that (can't confirm, currently at work), then the way to fix it if you've already messed with the brightness settings is, turn on ULMB mode and change brightness to 100, then turn of ULMB mode and put brightness at whatever setting you normally use. I think at that point, it will remember 100 brightness for ULMB, even if it doesn't say so on the menu when it's on. The firmware / OSD for this monitor really sucks... thankfully you only need to use it like once a year after everything is set.
Weird that they changed it from the XB270HU. I have separate brightness settings and they're visible in the OSD.

Edit:
Quote:
Originally Posted by dx234 View Post

I am afraid the monitor does not support two brightness levels, I just tried it out. The brightness is still lower than 100%
Are you expecting max brightness with ULMB on to match max brightness with ULMB off? Or am I misunderstanding you?
Edited by Shardnax - 8/25/16 at 8:24am
post #6173 of 7922
Quote:
Originally Posted by dx234 View Post

I am afraid the monitor does not support two brightness levels, I just tried it out. The brightness is still lower than 100%
Quote:
Originally Posted by Shardnax View Post

Weird that they changed it from the XB270HU. I have separate brightness settings and they're visible in the OSD.

Edit:
Are you expecting max brightness with ULMB on to match max brightness with ULMB off? Or am I misunderstanding you?

I'm home for my lunch... I confirmed that it works about how I thought. It does remember two different brightness settings, but there's a bug in the firmware that causes it to report it incorrectly. Internally, it remembers and switches to the last brightness you had for your mode (i.e. ULMB on, ULMB off). However, the reported # doesn't get updated to reflect it. To make matters more confusing, if you move the brightness slider when the reported # is wrong... it suddenly jumps the brightness to match the reported #.

dx234, if you want to confirm what I'm talking about, try this:
  1. Turn on ULMB
  2. Set brightness to 0 (ULMB + 0 brightness = incredibly dark)
  3. Turn off ULMB
  4. Set brightness to 100 (no ULMB + 100 brightness = super bright)
  5. Turn on ULMB again
  6. Go to the brightness setting, should still say 100 but be very dark
  7. Drop brightness to 99 (down 1), the screen will suddenly become bright

The gist of it is, it does remember what settings you are using, but the displayed # is just whatever number you adjusted to last... it'll be wrong if you flip between ULMB on/off. Just ignore what value it says thumbsdownsmileyanim.gif
Edited by nefrusy - 8/25/16 at 9:26am
post #6174 of 7922
I guess I'm not really surprised that Acer's FW is still a mess. Does ULMB still occasionally break with this monitor or did they fix it?
post #6175 of 7922
Quote:
Originally Posted by Shardnax View Post

Weird that they changed it from the XB270HU. I have separate brightness settings and they're visible in the OSD.

Edit:
Are you expecting max brightness with ULMB on to match max brightness with ULMB off? Or am I misunderstanding you?

The entire issue (and I said this before) is that the ULMB monitors DO NOT increase *VOLTAGE* to the backlight to compensate for strobing.
The 3d vision 2 (Lightboost) monitors increased backlight voltage by 1.8x to compensate for the reduction in lumens from enabling strobing in Lightboost mode. Since the LED's are on for only a short period at higher voltage, no damage or extra wear and tear was created by this. Benq blur reduction reverse engineered and used the same existing lightboost wires (some of the same circuitry is used) in their original Z series monitors, so voltage was also increased by 1.8x to compensate for strobing. The exact same voltage wire signal was used. The XL2730Z still does the same thing, but the ULMB monitors do not increase voltage current to the backlight. This is why many people find pulse widths of 1.0ms (or whatever value that corresponds to, if you are using a decimal value of up to 100) to be far too dim.
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post #6176 of 7922
I should mention that I do have the XB271HUA (it has a TN panel). I had the XB271HU before and the OSD is exactly the same, so I assume they behave the same.
Quote:
Originally Posted by Shardnax View Post

I guess I'm not really surprised that Acer's FW is still a mess. Does ULMB still occasionally break with this monitor or did they fix it?

I have the monitor for three days, ulmb works, how do you see if it breaks?
Quote:
Originally Posted by Shardnax View Post

Weird that they changed it from the XB270HU. I have separate brightness settings and they're visible in the OSD.

Edit:
Are you expecting max brightness with ULMB on to match max brightness with ULMB off? Or am I misunderstanding you?

I'd expect the monitor to remember the brightness I set in ulmb mode separate from the normal brightness value which the monitor should use according to the mode it is in.
Quote:
Originally Posted by mouacyk View Post

Use the presets. I set 3 for ULMB, cursor, and 100% brightness. 2 with no ULMB, no cursor, and 45% brightness.

I will have a look into the preset way to setting brightness. I can cope with pushing one or two buttons without navigating an osd menu.
Quote:
Originally Posted by nefrusy View Post


I'm home for my lunch... I confirmed that it works about how I thought. It does remember two different brightness settings, but there's a bug in the firmware that causes it to report it incorrectly. Internally, it remembers and switches to the last brightness you had for your mode (i.e. ULMB on, ULMB off). However, the reported # doesn't get updated to reflect it. To make matters more confusing, if you move the brightness slider when the reported # is wrong... it suddenly jumps the brightness to match the reported #.

dx234, if you want to confirm what I'm talking about, try this:
  1. Turn on ULMB
  2. Set brightness to 0 (ULMB + 0 brightness = incredibly dark)
  3. Turn off ULMB
  4. Set brightness to 100 (no ULMB + 100 brightness = super bright)
  5. Turn on ULMB again
  6. Go to the brightness setting, should still say 100 but be very dark
  7. Drop brightness to 99 (down 1), the screen will suddenly become bright

The gist of it is, it does remember what settings you are using, but the displayed # is just whatever number you adjusted to last... it'll be wrong if you flip between ULMB on/off. Just ignore what value it says thumbsdownsmileyanim.gif

I will try it and report the result.

Thanks for the big input and help, very appreciated.
post #6177 of 7922
Quote:
Originally Posted by Falkentyne View Post

The entire issue (and I said this before) is that the ULMB monitors DO NOT increase *VOLTAGE* to the backlight to compensate for strobing.
The 3d vision 2 (Lightboost) monitors increased backlight voltage by 1.8x to compensate for the reduction in lumens from enabling strobing in Lightboost mode. Since the LED's are on for only a short period at higher voltage, no damage or extra wear and tear was created by this. Benq blur reduction reverse engineered and used the same existing lightboost wires (some of the same circuitry is used) in their original Z series monitors, so voltage was also increased by 1.8x to compensate for strobing. The exact same voltage wire signal was used. The XL2730Z still does the same thing, but the ULMB monitors do not increase voltage current to the backlight. This is why many people find pulse widths of 1.0ms (or whatever value that corresponds to, if you are using a decimal value of up to 100) to be far too dim.
It doesn't bother me any. I run fairly low brightness and have no trouble matching it with ULMB on though.
Quote:
Originally Posted by dx234 View Post

I should mention that I do have the XB271HUA (it has a TN panel). I had the XB271HU before and the OSD is exactly the same, so I assume they behave the same.
I have the monitor for three days, ulmb works, how do you see if it breaks?
I'd expect the monitor to remember the brightness I set in ulmb mode separate from the normal brightness value which the monitor should use according to the mode it is in.
I will have a look into the preset way to setting brightness. I can cope with pushing one or two buttons without navigating an osd menu.
I will try it and report the result.

Thanks for the big input and help, very appreciated.
Turning ULMB on in the OSD only affects brightness and doesn't turn on ULMB. Cycling the power with the switch fixes it. I'm not certain as to what causes it and it's infrequent enough that it's a minor annoyance at worst.
post #6178 of 7922
Quote:
Originally Posted by nefrusy View Post


I'm home for my lunch... I confirmed that it works about how I thought. It does remember two different brightness settings, but there's a bug in the firmware that causes it to report it incorrectly. Internally, it remembers and switches to the last brightness you had for your mode (i.e. ULMB on, ULMB off). However, the reported # doesn't get updated to reflect it. To make matters more confusing, if you move the brightness slider when the reported # is wrong... it suddenly jumps the brightness to match the reported #.

dx234, if you want to confirm what I'm talking about, try this:
  1. Turn on ULMB
  2. Set brightness to 0 (ULMB + 0 brightness = incredibly dark)
  3. Turn off ULMB
  4. Set brightness to 100 (no ULMB + 100 brightness = super bright)
  5. Turn on ULMB again
  6. Go to the brightness setting, should still say 100 but be very dark
  7. Drop brightness to 99 (down 1), the screen will suddenly become bright

The gist of it is, it does remember what settings you are using, but the displayed # is just whatever number you adjusted to last... it'll be wrong if you flip between ULMB on/off. Just ignore what value it says thumbsdownsmileyanim.gif

I've just confirmed it. An interesting behaviour. I can get along with this. Now whenever I alt+tab between ulmb and non-ulmb mode, the brightness levels are the same.

I also noticed that the "G" button in osd opens a diagnostic screen. I do not know when that happened, it offered me some profiles before but it reveals interesting values, also for how long the monitor has been in use/turned on.


Edited by dx234 - 8/26/16 at 8:16am
post #6179 of 7922
Recieved my xb271hu a few weeks ago. First impression was that this monitor was perfect! BLB is barely visable and colour is great. The only problem is that i've just recently noticed a stuck red pixel near the bottom of my screen. Roughly about 4cm from the bottom of screen. I've done enough research to know it is a stuck pixel and not dead or a piece of dust. Tried the massaging technique.. No luck. Tried jscreen fix and a few other apps but no luck either! I barely notice the pixel while im gaming so was wondering if its worth sending this monitor back for a replacement over something so small? Does having a stuck pixel mean that i could find more over time? And what are the odds of getting a better monitor than the one i have now? Considering BLB and colour are near perfect? Please reply!!!
post #6180 of 7922
I just bought an xb271hu yesterday and have seen something weird with it.

Twice now when it has loaded into a game the screen glitches and the a couple pixels worth of vertical bars in the middle of the screen move to the far right edge of the screen... It's very weird. If I put my mouse in the middle of the screen I see part of the pointer on the far right edge.

If I reboot it goes back to normal. It even was happening outside of the game as I went to reboot. Now it just happened with anothe game..

Did I get a bad panel?

Thanks for any help!
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