Difference between revisions of "Talk:Intel graphics"

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(KMS)
m (Striking out an old option that no longer works.)
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I am going to remove the VideoRam calculation section soon as it is "no longer recommended"
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=== Setting gamma and brightness ===
The following is the xorg.0.log from following that section:
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(WW) intel(0): VideoRam configuration found, which is no longer recommended.
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(II) intel(0): Continuing with default 0kB VideoRam instead of 261120 kB.
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--[[User:Sand Lee|Sand Lee]] 20:18, 2 June 2009 (EDT)
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Actually I just noticed that the above section should fall under the Hotplug Disabled section, so I won't remove it, I'll just make it clearer. --[[User:Sand Lee|Sand Lee]] 20:38, 2 June 2009 (EDT)
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''Intel offers no way to adjust these at the driver level. Luckily these can be set with {{ic|xgamma}} and {{ic|xrandr}}.''
  
== KMS ==
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<s>Adding acpi_backlight=vendor to the kernel boot line allows the backlight to be changed on the Intel HD 3000 via xbacklight without root access. Perhaps a note could be added to provide this option. 
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[[User:Papabean|papabean]] ([[User talk:Papabean|talk]]) 02:40, 14 January 2013 (UTC)</s>
  
In the KMS section, the 'early' start way of doing things states that the file /etc/modprobe.d/modprobe.conf should be edited and appended to the FILES= section of mkinitcpio.conf. However, isn't it easier to put "i915.modeset=1" on the kernel line in grub? When doing so you don't need to rebuild the initramfs each time you want to try KMS or to temporarily disable it. You can simply edit the kernel line on the grub screen when booting. --[[User:Big gie|Big gie]] 10:53, 15 October 2009 (EDT)
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acpi_backlight=vendor stopped working a few kernels ago. (No. I did not revert to be certain).
  
::Thanks, I have added that to the wiki, so check that out whether it is OK. --[[User:Bubla|bubla]] 12:29, 20 October 2009 (EDT)
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However, [https://www.archlinux.org/packages/?sort=&repo=Community&q=intel-gpu-tools intel-gpu-tools] in the [[Arch_User_Repository#.5Bcommunity.5D|community]] repository includes the intel_backlight utility which allows one to manually set the backlight level.
  
::I've made some re-writting of the KMS part. I mainly re-arranged it in more structured way. Is it fine?
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[[User:Papabean|papabean]] ([[User talk:Papabean|talk]]) 04:36, 11 February 2013 (UTC)
  
=="intel-legacy: ''Old and obsolete''?"==
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== Best performance options ==
I realize that they are ''for'' old cards, but are the packages in the repo obsolete? This description might be misleading.<br>
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--[[User:Pacmanz|Pacmanz]] 18:45, 31 October 2009 (EDT)
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In my experience (i5 CPU w/ HD4000, Z77 mobo) the best performance can be had with the following options:
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* SNA acceleration method
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* Vertical sync '''enabled'''
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* TearFree option '''enabled'''
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* {{ic|<nowiki>i915.semaphores=1</nowiki>}} kernel option turned on
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Using the [[Repo-ck | ck kernel]] specific to the CPU architecture also seems to make the video performance more consistent, but not necessarily any faster.

Revision as of 04:36, 11 February 2013

Setting gamma and brightness

Intel offers no way to adjust these at the driver level. Luckily these can be set with xgamma and xrandr.

Adding acpi_backlight=vendor to the kernel boot line allows the backlight to be changed on the Intel HD 3000 via xbacklight without root access. Perhaps a note could be added to provide this option. papabean (talk) 02:40, 14 January 2013 (UTC)

acpi_backlight=vendor stopped working a few kernels ago. (No. I did not revert to be certain).

However, intel-gpu-tools in the community repository includes the intel_backlight utility which allows one to manually set the backlight level.

papabean (talk) 04:36, 11 February 2013 (UTC)

Best performance options

In my experience (i5 CPU w/ HD4000, Z77 mobo) the best performance can be had with the following options:

  • SNA acceleration method
  • Vertical sync enabled
  • TearFree option enabled
  • i915.semaphores=1 kernel option turned on

Using the ck kernel specific to the CPU architecture also seems to make the video performance more consistent, but not necessarily any faster.