Red Hat Bugzilla – Bug 1471703
HPE BL460c Gen9 blanks console during boot, nomodeset is required to see the output in ILO
Last modified: 2017-07-20 10:24:55 EDT
Created attachment 1299749 [details]
DMI-decode HPE BL460c Gen9
Description of problem:
kernel-3.10.0-514.rt56.210.el6rt.x86_64 introduced a console video-mode switch, which renders the ILO-console to blank. In order to be able to bring back the output, one has to add "nomodeset" to the kernel-commandline.
Version-Release number of selected component (if applicable):
* HPE BL460c Gen9
* kernel-3.10.0-514.rt56.210.el6rt.x86_64 fails
* kernel-3.10.0-514.el7 from RHEL7.3 GA does not suffer from that issue
Steps to Reproduce:
1. Install kernel-3.10.0-514.rt56.210.el6rt.x86_64 on HPE BL460c Gen9
2. boot system and open ILO-console
3. see the system blanking after kernel-init
Console blanks and no output is shown
Output is printed until login-prompt
Kernel-commandline: root=/dev/mapper/VGlocal-LVroot rd_NO_LUKS rd_LVM_LV=VGlocal/LVswap LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=VGlocal/LVroot KEYBOARDTYPE=pc KEYTABLE=de-latin1 crashkernel=256M rd_NO_DM SYSFONT=latarcyrheb-sun16 selinux=0 nosoftlockup mce=off printk.time=1 elevator=deadline intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll NOHZ=on numa_balancing=disable noht ipmi_si.force_kipmid=0 nmi_watchdog=0 pcie_aspm=performance hpet=disabled nohalt nohz=on console=ttyS0,115200 console=tty0 consoleblank=0
An additional information, the customer already tried the kernel with the fix for the BZ1452769 (kernel-rt-3.10.0-514.rt56.228.el6rt.x86_64) but the problem is still reproducing.
So, I requested the loan of an HPE BL460c Gen9 to try to reproduce the problem internally, but I am still waiting for the approval.
Andreas, I saw that gsslab has a lot of HPE BL460c Gen9, so, while waiting for the load, could you please try to reproduce the problem in a GSSLAB box?
This could speed up the fix.
Thanks in advance,
We found that kernel-commandline "video=640x400" rendered the console to blank. Changing this to "video=640x480" fixed that issue.
We also confirmed that https://bugzilla.redhat.com/1452769 fixed that issue as the previous kernel blanked the console even with the correct video settings.
So closing this case.