Force OpenGL version

Getting your soundcard to work, using Debian on non-i386 hardware, etc

Force OpenGL version

Postby DebianLinuxero » 2017-01-04 15:42

Hello.

I've just fresh installed Debian Testing on an Atom N270 with Intel i945 GME graphics chip.

GNOME 3 performs slow so KDE does.

I've read somewhere that the problem is that the Intel driver emulates via software some functionalities to comply OpenGL 2.1 version.
But the hardware only supports truly up to 1.4 ARB.

And those desktop environments make use of those functionalities if notice that there are avaliable.

So, what I wish to know is how may I force OpenGL to 1.4 prior to lauch X and where I should set it the more elegantly :wink:




PS : I have another laptop, with Intel Centriino M 1.6GHz with an Intel i915 GM chip.
[url=http://www.cpubenchmark.net/compare.php?cmp[]=614&cmp[]=1158]Both processors are low performant[/url], but the interesting thing here is that the graphic chip is inferior.
But GNOME 3 performs well.
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Re: Force OpenGL version

Postby stevepusser » 2017-01-04 21:11

The Atom N270's is a pretty slow chip compared to that Centrino, so I think that's at the root of KDE and GNOME 3's slowness. Those are rather heavy desktops.
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Re: Force OpenGL version

Postby vbrummond » 2017-01-04 21:56

I concur, the desktops are too heavy. I had an intel t4400 and gnome 3 was miserably slow.
System: Retina 5K iMac, 27-inch, Late 2015 - Intel i5-6600 3.3ghz, 8gb RAM, AMD Radeon R9 M395 2048 MB
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Re: Force OpenGL version

Postby DebianLinuxero » 2017-01-30 20:37

Ummh.

This looks interesting : http://www.phoronix.com/scan.php?page=news_item&px=Mesa-i915-OpenGL-2-Drop

I wonder if Gnome Shell will work with OpenGL 1.4 only.
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Re: Force OpenGL version

Postby wizard10000 » 2017-01-30 20:46

DebianLinuxero wrote:I've just fresh installed Debian Testing on an Atom N270 with Intel i945 GME graphics chip.

GNOME 3 performs slow so KDE does.

I've read somewhere that the problem is that the Intel driver emulates via software some functionalities to comply OpenGL 2.1 version.


The other reason the i945 is slow is that on netbooks it's underclocked. Design spec is 400MHz but in netbooks the chipset is run at either 133 or 166MHz.

There's a free utility I use called GMABooster to raise my video chipset back to 400MHz and it does make a fair bit of difference.

http://gmabooster.com

The Linux download link is broken but it points to here - http://www.techspot.com/downloads/4830- ... linux.html

Another reason these things are slow is the disk controller only does SATA1; between GMABooster and the 60GB SSD I have in my netbook the thing works great.

I am running openbox on the netbook, though - but even websurfing is acceptable.
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Re: Force OpenGL version

Postby stevepusser » 2017-01-30 22:58

You should also now be able to upgrade the kernel, Intel driver, and Mesa stack from jessie-backports to see if that increases the version of openGL supported. From what I gather, it does: https://forums.bunsenlabs.org/viewtopic.php?id=1185
The MX Linux repositories: Backports galore! If we don't have something, just ask and we'll try--we like challenges. New packages: AzPainter 2.0.6, Pale Moon 27.4.1, Liquorix kernel 4.11-9, mpv 0.26.0, Kodi 17.3, 0ad 0.0.22, Mesa 13.0.6
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Re: Force OpenGL version

Postby debiman » 2017-01-31 18:22

ok, i'll do a bit of thread hijacking if i may...
wizard10000 wrote:The other reason the i945 is slow is that on netbooks it's underclocked. Design spec is 400MHz but in netbooks the chipset is run at either 133 or 166MHz.
There's a free utility I use called GMABooster to raise my video chipset back to 400MHz and it does make a fair bit of difference.
http://gmabooster.com
The Linux download link is broken but it points to here - http://www.techspot.com/downloads/4830- ... linux.html

thanks for this!
i just tried this on my netbook (acer aspire one ZG5, a.k.a. AOA 150) and it seems to work! the utility does not error out, and simply reading out the new clock gives the expected 166MHz first, and 400MHz after.

my question:
- what are the implications of this? more heat? battery drain? both?
- my intel chip isn't exactly gma 950, it's:
Code: Select all
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
:?: :?: :?:

how can i test the difference?
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Re: Force OpenGL version

Postby wizard10000 » 2017-02-01 10:27

debiman wrote:my question:
- what are the implications of this? more heat? battery drain? both?
- my intel chip isn't exactly gma 950, it's:
Code: Select all
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
:?: :?: :?:

how can i test the difference?


You're fine, debiman. GMA950 includes the GMA945 chipset. Also, there's only one Linux version of GMABooster that services multiple chipsets.

On heat and battery life I'm gonna express an opinion that may not be real popular; IME processor frequency has very little impact on battery life. It has quite a bit to do with heat, but not as much about battery drain as one would think.

Let's say you wanted to open firefox. The task requires the same amount of processor resources regardless of clock speed; it takes the same number of processor cycles to perform the task at 80,000MHz as it does at 800MHz. The problem is that if you open firefox at 80,000MHz your netbook would probably melt, but the amount of power required to perform the task doesn't change much - we're just trying to keep the thing from overheating.

Same thing with a video card. Running it at a higher frequency will generate roughly the same amount of heat but in a shorter time and use *slightly* more power, but I've been running my netbook's chipset at 400MHz for years and it's worked just fine.

cheers -

edit: For anyone who's really interested in frequency vs. power consumption this paper is a bit technical but fascinating if you ask me http://async.org.uk/tech-reports/NCL-EE ... 15-197.pdf
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Re: Force OpenGL version

Postby debiman » 2017-02-02 06:40

thanks for the additional info!
and, yoo-hoo, another little boost for my netbook. :D they don't make 'em like this anymore!

now back on topic (serious face).
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