** Description changed:
An issue has come up with MI300 OEM deployments where, due to the
current limit of 64 drm device nodes in the kernel, MI300 systems with
an integrated display (e.g., mgag200 or ast) fail to light up the
console because the AMD GPU driver has used up all of the drm device
nodes. A patch set recently landed in drm-misc to extend the number of
device nodes. These are the relevant commits:
*
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5fbca8b48b3050ae7fb611a8b09af60012ed6de1
("drm: Use XArray instead of IDR for minors")
*
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=45c4d994b82b08f0ce5eb50f8da29379c92a391e
("accel: Use XArray instead of IDR for minors")
*
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=071d583e01c88272f6ff216d4f867f8f35e94d7d
("drm: Expand max DRM device number to full MINORBITS")
+
+ When enabled, additional drm devices will become available:
+ ```
+ root123@g593-sx1:~$ ls -l /sys/class/drm/
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card10 ->
../../devices/platform/amdgpu_xcp_7/drm/card10
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card11 ->
../../devices/platform/amdgpu_xcp_8/drm/card11
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card12 ->
../../devices/platform/amdgpu_xcp_9/drm/card12
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card13 ->
../../devices/platform/amdgpu_xcp_10/drm/card13
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card14 ->
../../devices/platform/amdgpu_xcp_11/drm/card14
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card15 ->
../../devices/platform/amdgpu_xcp_12/drm/card15
+ lrwxrwxrwx 1 root root 0 Sep 21 00:55 card16 ->
../../devices/platform/amdgpu_xcp_13/drm/card16
+ ...
+ ```
** Also affects: linux-oem-6.11 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.11 (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Oracular)
Importance: Undecided
Status: Incomplete
** Also affects: linux-oem-6.11 (Ubuntu Oracular)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Noble)
Status: New => Invalid
** Changed in: linux (Ubuntu Oracular)
Status: Incomplete => Confirmed
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Status: New => Triaged
** Changed in: linux-oem-6.11 (Ubuntu Oracular)
Status: New => Invalid
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2078773
Title:
Unable to use AMD Instinct MI300 with integrated display
Status in HWE Next:
New
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-6.11 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Invalid
Status in linux-oem-6.11 source package in Noble:
Triaged
Status in linux source package in Oracular:
Confirmed
Status in linux-oem-6.11 source package in Oracular:
Invalid
Bug description:
An issue has come up with MI300 OEM deployments where, due to the
current limit of 64 drm device nodes in the kernel, MI300 systems with
an integrated display (e.g., mgag200 or ast) fail to light up the
console because the AMD GPU driver has used up all of the drm device
nodes. A patch set recently landed in drm-misc to extend the number of
device nodes. These are the relevant commits:
*
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5fbca8b48b3050ae7fb611a8b09af60012ed6de1
("drm: Use XArray instead of IDR for minors")
*
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=45c4d994b82b08f0ce5eb50f8da29379c92a391e
("accel: Use XArray instead of IDR for minors")
*
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=071d583e01c88272f6ff216d4f867f8f35e94d7d
("drm: Expand max DRM device number to full MINORBITS")
When enabled, additional drm devices will become available:
```
root123@g593-sx1:~$ ls -l /sys/class/drm/
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card10 ->
../../devices/platform/amdgpu_xcp_7/drm/card10
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card11 ->
../../devices/platform/amdgpu_xcp_8/drm/card11
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card12 ->
../../devices/platform/amdgpu_xcp_9/drm/card12
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card13 ->
../../devices/platform/amdgpu_xcp_10/drm/card13
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card14 ->
../../devices/platform/amdgpu_xcp_11/drm/card14
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card15 ->
../../devices/platform/amdgpu_xcp_12/drm/card15
lrwxrwxrwx 1 root root 0 Sep 21 00:55 card16 ->
../../devices/platform/amdgpu_xcp_13/drm/card16
...
```
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