Bug 1972122

Rick - assigning directly to you to (rather than Vitaly)... 

This is a case of a bug w/ Triaged keyword being automatically set due to ITR being set and I wouldn't want to see it "lost" on virt-maint's "backlog" queue.

https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1259 enables DRM_HYPERV and disables FB_HYPERV.

hi Vitaly, 
 

we checked and found it has been included in the upstream build, but still not been enabled, could you help give an earlier build for check?  thanks



 kernel-5.14.0-0.rc1.20210714git40226a3d96ef.18.eln112.x86_64.rpm

kernel-core-5.14.0-0.rc1.20210714git40226a3d96ef.18.eln112.x86_64.rpm

kernel-modules-5.14.0-0.rc1.20210714git40226a3d96ef.18.eln112.x86_64.rpm



[rhel@vm-197-177 boot]$ cat config-5.14.0-0.rc1.20210714git40226a3d96ef.18.eln112.x86_64 | grep -i DRM_HYPER

# CONFIG_DRM_HYPERV is not set

[rhel@vm-197-177 boot]$ cat config-5.14.0-0.rc1.20210714git40226a3d96ef.18.eln112.x86_64 | grep -i config_fb_HY

CONFIG_FB_HYPERV=m

[rhel@vm-197-177 boot]$ lsmod | grep -i hyper

hid_hyperv 20480 0

hyperv_keyboard 20480 0

hyperv_fb 53248 2

hv_vmbus 344064 7 hv_balloon,hv_utils,hv_netvsc,hid_hyperv,hv_storvsc,hyperv_keyboard,hyperv_fb

[rhel@vm-197-177 boot]$ lsmod | grep -i hyperv_fb

hyperv_fb 53248 2

hv_vmbus 344064 7 hv_balloon,hv_utils,hv_netvsc,hid_hyperv,hv_storvsc,hyperv_keyboard,hyperv_fb

[rhel@vm-197-177 boot]$

Apparently, the change is not yet in kernel-5.14.0-0.rc1.20210714git40226a3d96ef.18.eln112, the merge request just got merged
yesterday (20210715). I'd expect next build to come with CONFIG_DRM_HYPERV.

Hi Vitaly,

We checked on below build, and found the drm already merged, could you help change this bug to On_QA? thanks

RHEL-9.0.0-20210729.2-x86_64-dvd1.iso

kernel-5.14.0-0.rc3.29.el9.x86_64.rpm   

[rhel@vm-198-147 ~]$ lsmod | grep drm
hyperv_drm             24576  1
drm_kms_helper        303104  3 hyperv_drm
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
cec                    53248  1 drm_kms_helper
drm                   638976  4 drm_kms_helper,hyperv_drm
hv_vmbus              143360  7 hv_balloon,hv_utils,hv_netvsc,hid_hyperv,hv_storvsc,hyperv_keyboard,hyperv_drm
[rhel@vm-198-147 ~]$ lsmod | grep  hyperv_fb
[rhel@vm-198-147 ~]$ 
[rhel@vm-198-147 ~]$ uname -r
5.14.0-0.rc3.29.el9.x86_64
[rhel@vm-198-147 ~]$

Checked on RHEL-9.0.0-20210828.2-x86_64 (5.14.0-0.rc7.54.el9.x86_64)
Now the hyperv_drm module was loaded and enabled

[root@bootp-73-199-12 rhel]# lsmod | grep hyperv_drm
hyperv_drm             24576  1
drm_kms_helper        303104  3 hyperv_drm
drm                   638976  4 drm_kms_helper,hyperv_drm
hv_vmbus              143360  7 hv_balloon,hv_utils,hv_netvsc,hid_hyperv,hv_storvsc,hyperv_keyboard,hyperv_drm

[rhel@bootp-73-199-12 ~]$ lsmod | grep hyperv_fb
[rhel@bootp-73-199-12 ~]$ 



For gen1, it blocked by bug: https://bugzilla.redhat.com/show_bug.cgi?id=1988922

and check the basic function works on gen2 (filed a bug may related to it: https://bugzilla.redhat.com/show_bug.cgi?id=1999697)

For detail test will check as: https://docs.google.com/document/d/1y6UuoC8-QPZ89s78hCkiYvkAlwF1sYEayGQ3pC17eX8/edit#

Mark this bug as verified, and will file new bug if encounter issue during testing.

Thanks.

Hi Vitaly/Jiri,

I don't find this in RHEL9.0-Beta release note, so I set requires_doc_text ?
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9-beta/html/9.0_release_notes/overview#overview-major-changes

Could you help check we need add this new feature/change into RHEL9.0 release note? thanks

(In reply to xxiong from comment #14)
> 
> Could you help check we need add this new feature/change into RHEL9.0
> release note?

I'm not exactly sure this deserves a release note but we can certainly state something like

"DRM driver replaces legacy framebuffer driver for Hyper-V synthetic video device"