white flashing display with 5.9.12
This issue happens on a ICL Lenovo laptop (i7-1065G7) running Fedora 35 (Workstation Edition), kernel 5.19.12-100.fc35. Issue does not happen with previous kernel update 5.19.11-100.fc35.
After kernel selection in grub menu, laptop display starts to blink like lights in a 90's rave party. It looks like white flash happens for every display update (?) I cannot change VT or do anything else since display is just blinking.
Here is kernel log from such a boot: kernel_log.txt
Activity
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FYI @jheikkil who has similar (or same?) laptop
added Community platform: ICL labels
@jani.saarinen FYI
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Here is log output from 5.19.11-100: working_kernel_log.txt
I haven't tried a custom kernel yet but can try later on.
@tpalli , please check and close if fixed.
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Yes, 5.19.13 works fine! Thanks @vsyrjala !
FYI, i915 worked fine for me with 5.19.12 on a ThinkPad X230 2325-AZ8, Intel Core i5-3320M. (More hardware information e.g. here.)
I report this here because of this question from greg k-h: "so there's something odd with the older hardware?" I suggest to read the whole regression thread.
I hope this isn't in any way related to this bug: SKL screen flicker after suspend and dmesg "[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun" on HP EliteBook Folio G1
Edited by Andreas ThalhammerI think we're seeing some general difference in the VBIOS/GOP behaviour on old vs. new hardware. On old hw the it seems to program the power sequencer a bit more thoroughly. But no idea if there's a clear cutoff anywhere or just random chance on when the firmware got released/etc.
That said, I still recommend that no one use 5.19.12. No point in taking any risks.
@vsyrjala , can you chime in here?
I have opened a seperate issue in red hat. Problem remain after upgrade to kernel 6. https://bugzilla.redhat.com/show_bug.cgi?id=2137083
I starting to think this is a electrical over stress after kernel upgrade. After I connect to HDMI cable, the screen flickering disappears. But if i disconnect the cable, the flickering continues. I searched the net and someone suggested this is an issue of the inverter circuit of the LCD display. But this couldnt be the problem since my WIndows and kernel 5.18 runs with no issue of screen flickering. This is a software induced issue.
I also checked the voltage of the new kernel versus the old kernel, the wats consumed in kernel 6 is even less compare to kernel 5.18. I doubt that the issue could be caused by the incorrect voltage to the single screen? Double screen with hdmi output didnt have any problem.
