Without GRUB_GFXMODE and GRUB_GFXPAYLOAD_LINUX I get

Apr 26 13:07:57 usbpc kernel: [   18.245417] AES CTR mode by8 optimization 
enabled
Apr 26 13:07:57 usbpc kernel: [   18.256518] alg: No test for fips(ansi_cprng) 
(fips_ansi_cprng)
Apr 26 13:07:57 usbpc kernel: [   18.271819] fbcon: mgadrmfb (fb0) is primary 
device
Apr 26 13:07:57 usbpc kernel: [   18.340257] ipmi_si IPI0001:00: Found new BMC 
(man_id: 0x000157, prod_id: 0x0048, dev_id: 0x21)
Apr 26 13:07:57 usbpc kernel: [   18.340261] ipmi_si IPI0001:00: IPMI kcs 
interface initialized
Apr 26 13:07:57 usbpc kernel: [   18.539515] Console: switching to colour frame 
buffer device 160x64
Apr 26 13:07:57 usbpc kernel: [   18.577386] mgag200 0000:03:00.0: fb0: 
mgadrmfb frame buffer device
Apr 26 13:07:57 usbpc kernel: [   18.585608] [drm] Initialized mgag200 1.0.0 
20110418 for 0000:03:00.0 on minor 0
Apr 26 13:07:57 usbpc kernel: [   18.588803] intel_rapl: Found RAPL domain 
package
Apr 26 13:07:57 usbpc kernel: [   18.588817] intel_rapl: Found RAPL domain core

The console output doesn't get stuck, either.

> That might be an effect of the driver being confused by GRUB's
> modesetting.  I don't know.

Maybe. OTOH, upstream's kernel (built on unstable) just works,
using the same grub configuration, installed on the same bootable
USB stick and booted on the same hardware.

Do you think there could be a side effect of the recent patch
cleanup for mgag200 & cirrus done for 4.4~rc5-1~exp1?


Regards
Harri

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