The following driver Options are supported for the i and i chipsets: Option "CacheLines" " integer " This allows the user to change the amount of graphics memory used for 2D acceleration and video when XAA acceleration is enabled. Decreasing this amount leaves more for 3D textures. Increasing it can improve 2D performance at the expense of 3D performance. Default: depends on the resolution, depth, and available video memory. The driver attempts to allocate space for at 3 screenfuls of pixmaps plus an HD-sized XV video.
The default used for a specific configuration can be found by examining the Xorg log file. Default: enabled. Default: 8-bits per RGB for 8-bit modes. The integer parameter specifies the number of surfaces to use. Valid values are 6 and 7.
Default: XvMC is disabled. VideoRam integer This option specifies the amount of system memory to use for graphics, in KB. DRI require at least a value of Higher values may give better 3D performance, at expense of available system memory. Option "Accel" " boolean " Enable or disable acceleration. Default: acceleration is enabled. The following driver Options are supported for the M and later chipsets: Option "Accel" " boolean " Enable or disable acceleration. Option "Present" " boolean " Enable use of hardware counters and flow control for the Present extension.
There are a couple of backends available for accelerating the DDX. Until that process is complete, the ability to choose which backend to use remains for backwards compatibility. In addition, there are a pair of sub-options to limit the acceleration for debugging use. Specify "off" or "none" to disable all acceleration, or "blt" to disable render acceleration and only use the BLT engine. This option forces X to perform all rendering to a backbuffer prior to updating the actual display. It requires an extra memory allocation the same size as a framebuffer, the occasional extra copy, and requires Damage tracking.
Thus enabling TearFree requires more memory and is slower reduced throughput and introduces a small amount of output latency, but it should not impact input latency. However, the update to the screen is then performed synchronously with the vertical refresh of the display so that the entire update is completed before the display starts its refresh.
That is only one frame is ever visible, preventing an unsightly tear between two visible and differing frames. Note that this replicates what the compositing manager should be doing, however TearFree will redirect the compositor updates and those of fullscreen games directly on to the scanout thus incurring no additional overhead in the composited case.
Also note that not all compositing managers prevent tearing, and if the outputs are rotated, there will still be tearing without TearFree enabled. Default: TearFree is disabled. As mentioned above, the modesetting DDX driver is now the default driver on newer Intel graphics chipsets for Gentoo.
No additional steps or configuration are necessary. If it's necessary to force Xorg to load the modesetting driver the following config snippet can be used:. In order to enable Kernel Mode Setting KMS as soon as possible, modesetting either needs to be built into the kernel, or be loaded with initramfs if it is built as a module.
So, in order to get early KMS, those who use it have to create a. As of November 15th, [8] Vulkan is supported in the main ebuild repository for Intel Core processors using the i mesa driver. Please note, that this will build a working Vulkan driver, but it will not provide a libvulkan.
All provided commands can be discovered by listing the provided files with equery :. The i kernel driver includes the ability reduce flickering caused by modesetting operations during boot time.
It does so by avoiding unnecessary modesetting operations when they are not needed [9]. For CPUs older than Skylake, fastboot can be enabled by passing the i This can either be set using the built-in kernel command-line or via a bootloader's kernel options. If the acl USE flag is enabled globally and elogind is being used default for desktop profiles permissions to video cards will be handled automatically. It is possible to check the permissions using getfacl :.
A broader solution is to add the user s needing access the video card to the video group:. Note that users will be able to run X without permission to the DRI subsystem, but acceleration will be disabled. The X server is designed to work out-of-the-box, with no need to manually edit X. Org's configuration files. See Kernel parameters for more info. Video port names can be listed with xrandr. The "Broadcast RGB" property in the Intel driver defines the color range which can be used by the display - either "Limited " which limits the color range for some displays that cannot properly process full range color signals and "Full".
Since kernel 3. If detections faulty falls back to limited color range, it results in weathered colors and grey blacks. There is no way to persist this setting in xorg. To fix this problem, use the following kernel parameter :. If such a crash happens, you won't see any logs reporting this problem.
Adding the following Kernel parameters may help to resolve the problem. That workaround is strictly not related to Intel graphics but it does solve related issues. Adding this kernel parameter will also solve hangs when you change display brightness on certain Lenovo machines. This does solve random hangs on certain Intel systems, notably Goldmount and Kaby Lake Refresh chips.
That is absolutely not ideal and does result in higher power use and lower battery life. However, it does solve random hangs on many Intel systems. Intel "Baytrail" chips are known to randomly hang without this kernel parameter due to a hardware flaw [16]. Running with cstates and display power management disabled is not advisable if the actual problem is related to SATA power management and ahci. Check Linux Reviews for more details.
Namespaces Page Discussion. Views Read View source View history. See [1] , [2] , Xorg Installation , and modesetting 4. The i module would fail to initialize as shown in system journal.
Note: The following requires xfvideo-intel. Note: You might need to add more device sections than the one listed above. This will be indicated where necessary. Restrication Glamor has a restriction with latest xserver. Thanks for Chris Wilson's help to refine this function. Fully support all color formats for GLES2 port. And thanks Zhengyu to fix some PVR releated problems.
Fixed many of the bugs for cairo-test-suite, now we get almost identical or even better result than UXA. On PVR platform, we even get about 10x performance improvement with this feature. Plan We plan to release next version 0. And the following major features will be added: Fully gradient optimization including linear and radial.
Actually, the code is already in this release, but as it has some bugs and we disable it currently. Will fix those bug and enable it at next release. Large pixmap support. Currently, mesa only support 8Kx8K texture size, if a pixmap has larger size, we have to store it in main memory and is not efficient.
This feature will tile a large pixmap to a texture array. Fully trapezoid optimization. Fine tune the fbo cache mechanism. Source Glamor is managed in git. Last edited Fri May 7
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