Difference between revisions of "Talk:Intel graphics"

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(There is no i915.powersave option: Close)
 
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== <s>Corrupted fonts after resume from ram</s> ==
  
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I've finally found searching across many forums the solution for my i915 graphic card.
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My card is: "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 04)".
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The problem is: After resuming from ram, some letter have a missing orizzontal line, for example I see ¦ instead of |. Another thing is that sometime, after resuming, the cpu goes to 100% of usage with no apparent reason.
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The solution is: Create the file /etc/modprobe.d/local.conf (if it doesn't already exist) and add to it the line "options drm_kms_helper poll=N".
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I cannot understand this mystery but now I can use "Suspend to ram" as many times as I want.
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{{unsigned|13 August 2013|Livix}}
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:Closing  -- [[User:Rdeckard|Rdeckard]] ([[User_talk:Rdeckard|talk]]) 00:14, 11 November 2017 (UTC)
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== [drm:intel_pipe_update_start [i915]] *ERROR* Potential atomic update failure on pipe A ==
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Maybe the solution to get rid of the above dmesg log spamming could be mentioned? You just add `options i915 enable_psr=0` to the file `/etc/modprobe.d/i915.conf`. [[User:Bjourne|Bjourne]] ([[User talk:Bjourne|talk]]) 17:04, 19 August 2016 (UTC)
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== Backlight is not adjustable after trying various acpi_osi values ==
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[http://unix.stackexchange.com/q/315178/3645 Full details] on Stack Exchange.
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{{unsigned|20:04, 8 October 2016‎|L0b0}}
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== DRI3 confusion ==
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I've seen in the forum people ask from time to time how to enable DRI3 on their system.
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As stated many times there, DRI3 should be on for most (if not all) of them. But people keep telling them to check
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cat /var/log/Xorg.0.log | grep DRI
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which shows up this message:
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GLX: Initialized DRI2 GL provider for screen 0
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which is *not accurate*.
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If you run this command instead:
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LC_ALL=C LIBGL_DEBUG=verbose glxinfo | grep DRI
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you might stump with this other message:
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libGL: Using DRI3 for screen 0
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which proves you are using DRI3 even though X11 doesn't reply with the correct information.
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The command was adapted from [https://lists.x.org/archives/xorg-devel/2014-June/042735.html xorg mailing list].
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So, it think adding this information in the page could be of major interest. What do you think?
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[[User:Franzrogar|Franzrogar]] ([[User talk:Franzrogar|talk]]) 07:01, 4 November 2016 (UTC)
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== Guide for screen scaling with external displays via xrandr? ==
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I tried to find instructions for scaling the display resolution without stretching on this wiki page, but the section only says that it's not implemented in the Intel drivers yet. However, [https://unix.stackexchange.com/questions/220387/how-to-set-scaling-mode-for-external-displays-on-intel-gpu this stackexchange thread] has a workaround using an xrandr transform matrix. Should this be added to the wiki page?
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[[User:Ibara|Ibara]] ([[User talk:Ibara|talk]]) 12:35, 22 May 2017 (UTC)
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== <s>SNA vs UXA</s> ==
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As apparently there is still the believe that UXA can and should be used, here are several sources showing that UXA has been deprecated a long time ago and compared to SNA has absolutely no benefit:
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* Performance comparison from 2013: https://ickle.wordpress.com/2013/10/01/a-glamorous-refresh/
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* https://cgit.freedesktop.org/xorg/driver/xf86-video-intel/log/?qt=grep&q=sna
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* https://cgit.freedesktop.org/xorg/driver/xf86-video-intel/log/?qt=grep&q=uxa
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Please do not revert changes without asking why.
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--[[User:EoD|EoD]] ([[User talk:EoD|talk]]) 02:04, 9 November 2017 (UTC)
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:Nowhere in your links it is said that UXA has been "deprecated", which is quite different from being inactive. And the benchmark concerns only one specific hardware configuration, you can't pull general statements out of that. -- [[User:Lahwaacz|Lahwaacz]] ([[User talk:Lahwaacz|talk]]) 07:31, 9 November 2017 (UTC)
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::As said, what configuration is "best" highly depends on hardware setup. (including configurations that don't include xf86-video-intel at all) Closing -- [[User:Alad|Alad]] ([[User talk:Alad|talk]]) 16:35, 9 November 2017 (UTC)

Latest revision as of 01:27, 12 February 2018

Corrupted fonts after resume from ram

I've finally found searching across many forums the solution for my i915 graphic card.

My card is: "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 04)".

The problem is: After resuming from ram, some letter have a missing orizzontal line, for example I see ¦ instead of |. Another thing is that sometime, after resuming, the cpu goes to 100% of usage with no apparent reason.

The solution is: Create the file /etc/modprobe.d/local.conf (if it doesn't already exist) and add to it the line "options drm_kms_helper poll=N".

I cannot understand this mystery but now I can use "Suspend to ram" as many times as I want. —This unsigned comment is by Livix (talk) 13 August 2013. Please sign your posts with ~~~~!

Closing -- Rdeckard (talk) 00:14, 11 November 2017 (UTC)

[drm:intel_pipe_update_start [i915]] *ERROR* Potential atomic update failure on pipe A

Maybe the solution to get rid of the above dmesg log spamming could be mentioned? You just add `options i915 enable_psr=0` to the file `/etc/modprobe.d/i915.conf`. Bjourne (talk) 17:04, 19 August 2016 (UTC)

Backlight is not adjustable after trying various acpi_osi values

Full details on Stack Exchange.

—This unsigned comment is by L0b0 (talk) 20:04, 8 October 2016‎. Please sign your posts with ~~~~!

DRI3 confusion

I've seen in the forum people ask from time to time how to enable DRI3 on their system.

As stated many times there, DRI3 should be on for most (if not all) of them. But people keep telling them to check

cat /var/log/Xorg.0.log | grep DRI

which shows up this message:

GLX: Initialized DRI2 GL provider for screen 0

which is *not accurate*.

If you run this command instead:

LC_ALL=C LIBGL_DEBUG=verbose glxinfo | grep DRI

you might stump with this other message:

libGL: Using DRI3 for screen 0

which proves you are using DRI3 even though X11 doesn't reply with the correct information.

The command was adapted from xorg mailing list.

So, it think adding this information in the page could be of major interest. What do you think?

Franzrogar (talk) 07:01, 4 November 2016 (UTC)

Guide for screen scaling with external displays via xrandr?

I tried to find instructions for scaling the display resolution without stretching on this wiki page, but the section only says that it's not implemented in the Intel drivers yet. However, this stackexchange thread has a workaround using an xrandr transform matrix. Should this be added to the wiki page?

Ibara (talk) 12:35, 22 May 2017 (UTC)

SNA vs UXA

As apparently there is still the believe that UXA can and should be used, here are several sources showing that UXA has been deprecated a long time ago and compared to SNA has absolutely no benefit:

Please do not revert changes without asking why. --EoD (talk) 02:04, 9 November 2017 (UTC)

Nowhere in your links it is said that UXA has been "deprecated", which is quite different from being inactive. And the benchmark concerns only one specific hardware configuration, you can't pull general statements out of that. -- Lahwaacz (talk) 07:31, 9 November 2017 (UTC)
As said, what configuration is "best" highly depends on hardware setup. (including configurations that don't include xf86-video-intel at all) Closing -- Alad (talk) 16:35, 9 November 2017 (UTC)