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| author | Tristan Corrick <tristan@corrick.kiwi> | 2018-12-26 23:46:27 +1300 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-01-03 20:07:41 +0000 |
| commit | a6fe456cb52c5133eb5e09d11dc83c0419b5692a (patch) | |
| tree | 632d715752502ac836bb619a963ff7ebffe65389 /Documentation/northbridge | |
| parent | 68dc36c9b30f2ca48a199861bf450af3a6a0fd52 (diff) | |
| download | coreboot-a6fe456cb52c5133eb5e09d11dc83c0419b5692a.tar.xz | |
Doc/nb/intel/haswell: Add a list of known issues
Change-Id: If0339831550f6c70e8056f78633e9a402f35a793
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/c/30455
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'Documentation/northbridge')
| -rw-r--r-- | Documentation/northbridge/intel/haswell/index.md | 4 | ||||
| -rw-r--r-- | Documentation/northbridge/intel/haswell/known-issues.md | 28 |
2 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/northbridge/intel/haswell/index.md b/Documentation/northbridge/intel/haswell/index.md index 3eb80594b8..87fb56f483 100644 --- a/Documentation/northbridge/intel/haswell/index.md +++ b/Documentation/northbridge/intel/haswell/index.md @@ -6,3 +6,7 @@ coreboot. ## Proprietary blobs - [mrc.bin](mrc.bin.md) + +## Issues + +- [Known issues](known-issues.md) diff --git a/Documentation/northbridge/intel/haswell/known-issues.md b/Documentation/northbridge/intel/haswell/known-issues.md new file mode 100644 index 0000000000..c684b8fd65 --- /dev/null +++ b/Documentation/northbridge/intel/haswell/known-issues.md @@ -0,0 +1,28 @@ +# Known issues with Haswell + +These issues are specific to the Haswell architecture. For a given +mainboard, there might be additional issues to those listed here. + +## PCIe graphics + +```eval_rst +Using a PCIe graphics card for display output is not currently +supported. This is because :doc:`./mrc.bin` requires workarounds to +have such a feature working correctly. +``` + +However, there is a [patch on Gerrit][hsw-gfx-gerrit] that allows PCIe +graphics to be used for display output. This patch is not guaranteed to +be of the same level of quality as code committed to coreboot. + +Still, in some cases, a PCIe graphics card can be used for rendering, +while the integrated graphics device is used for display output. This +can be achieved under GNU/Linux by using [PRIME GPU offloading][PRIME]. + +## PCIe 3.0 + +Only PCIe 2.0 has been tested so far. PCIe 3.0 could potentially have +stability issues. + +[PRIME]: https://wiki.archlinux.org/index.php/PRIME +[hsw-gfx-gerrit]: https://review.coreboot.org/c/30456 |