On 6/4/2021 9:00 AM, Wei Liu wrote:
On Fri, Jun 04, 2021 at 02:25:01PM +0200, Vitaly Kuznetsov wrote:
Hi,
Commit ccf953d8f3d6 ("fb_defio: Remove custom address_space_operations") seems to be breaking Hyper-V framebuffer (drivers/video/fbdev/hyperv_fb.c) driver for me: Hyper-V guest boots well and plymouth even works but when I try starting Gnome, virtual screen just goes black. Reverting the above mentioned commit on top of 5.13-rc4 saves the day. The behavior is 100% reproducible. I'm using Gen2 guest runing on Hyper-V 2019. It was also reported that Gen1 guests are equally broken.
Is this something known?
I've heard a similar report from Vineeth but we didn't get to the bottom of this.
I have just tried reverting the commit mentioned above and it solves the GUI freeze I was also seeing. Previously, login screen was just freezing, but VM was accessible through ssh. With the above commit reverted, I can login to Gnome.
Looks like I am also experiencing the same bug mentioned here.
Thanks, Vineeth