All the changes are in v6.12-rc1 now.
** Summary changed:
- Unable to use AMD Instinct MI300 with integrated display
+ Missing devices nodes for AMD Instinct MI300 card when installed along with
integrated display
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Status: Triaged => In Progress
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Importance: Undecided => High
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
** Changed in: linux (Ubuntu Oracular)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu Oracular)
Importance: Undecided => High
** Changed in: linux (Ubuntu Oracular)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
** Description changed:
+ [SRU Justification]
+
+ BugLink: https://bugs.launchpad.net/bugs/2078773
+
+ [Impact]
+
+ Missing devices nodes for AMD Instinct MI300 card when installed along
+ with integrated display.
+
+ [Fix]
+
+ *
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.12-rc1&id=5fbca8b48b3050ae7fb611a8b09af60012ed6de1
("drm: Use XArray instead of IDR for minors")
+ *
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.12-rc1&id=45c4d994b82b08f0ce5eb50f8da29379c92a391e
("accel: Use XArray instead of IDR for minors")
+ *
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.12-rc1&id=071d583e01c88272f6ff216d4f867f8f35e94d7d
("drm: Expand max DRM device number to full MINORBITS")
+
+ [Test Case]
+
+ 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
+ ...
+ ```
+
+ [Where problems could occur]
+
+ New hardware support. Expect more fixes in need.
+
+ [Other Info]
+
+ Targeting last supported generic/oem kernels only. Nominated for
+ oem-6.11, generic-6.11 and unstable.
+
+ ========== original bug descriptions ==========
+
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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https://bugs.launchpad.net/bugs/2078773
Title:
Missing devices nodes for AMD Instinct MI300 card when installed along
with integrated display
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
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:
In Progress
Status in linux source package in Oracular:
In Progress
Status in linux-oem-6.11 source package in Oracular:
Invalid
Bug description:
[SRU Justification]
BugLink: https://bugs.launchpad.net/bugs/2078773
[Impact]
Missing devices nodes for AMD Instinct MI300 card when installed along
with integrated display.
[Fix]
*
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.12-rc1&id=5fbca8b48b3050ae7fb611a8b09af60012ed6de1
("drm: Use XArray instead of IDR for minors")
*
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.12-rc1&id=45c4d994b82b08f0ce5eb50f8da29379c92a391e
("accel: Use XArray instead of IDR for minors")
*
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.12-rc1&id=071d583e01c88272f6ff216d4f867f8f35e94d7d
("drm: Expand max DRM device number to full MINORBITS")
[Test Case]
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
...
```
[Where problems could occur]
New hardware support. Expect more fixes in need.
[Other Info]
Targeting last supported generic/oem kernels only. Nominated for
oem-6.11, generic-6.11 and unstable.
========== original bug descriptions ==========
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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