As I wrote earlier, the EDID file I used came from edid-generator github
and it is called 1920x1080.bin . You want me to google that for you?
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I'm not sure this is a Linux problem. It may be that the panel is
reporting bad EDID data. I haven't investigated enough to say for sure.
In any case none of the more recent Linux releases fixed the problem in
my tests. Also no other open source OSs were able to deal with the
onboard LCD panel
I was able to display on an external monitor, or the internal monitor,
but not both simultaneously. I didn't spend too much time trying to
solve the problem and now the laptop is with a family member at another
location. If you work on this issue and find a solution please post it
here.
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** Summary changed:
- failure to detect and use Intel 620 graphics pci id 3ea0
+ drm fails to accept edid version 2.4
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https://bugs.launchpad.net/bugs/1821533
Title:
drm
I was able to get the onboard LCD panel working, finally, as follows:
First I extracted the edid file from the LCD panel using get-edid and
putting that in /lib/firmware/edid/ncp.bin, and then forcing the kernel
to take that using the kernel boot option
drm.edid_firmware=edid/ncp.bin. This
Below is the EDID information from the onboard panel. Why can't drm/i915
deal with it?
guest@guest-ZenBook-UX431FA:~$ sudo get-edid | parse-edid
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
No EDID on bus 0
No EDID on bus 1
No EDID on bus 2
No EDID
I think the problem is that the laptop's onboard LCD panel is reporting
EDID data with version 2 and the i915 driver can only deal with version
1 at the moment. How can this be fixed?
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Correction: last message should read "Why is the driver/module expecting
EDID major version *1* and getting *2*?
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https://bugs.launchpad.net/bugs/1821533
Title:
failure to
Progress! Based on information in dmesg, pasted in at the end of this
message, I thought maybe the graphics device was found OK but the laptop
was trying to drive an external monitor instead of the onboard display.
Sure enough, when I boot without nomodeset option and with an external
HDMI monitor
Is it known whether any machines with Intel Graphics 620 with pci id
0x3ea0 have functioning graphics with any version of Ubuntu?
This is relatively new hardware, but it seems unlikely that I am the
only one in the world who has tried this combination, and if other
people with different machines
I tried booting 4.18.0-16-generic (which i believe is the hwe kernel)
with kernel option drm.debug=0xff. When the system came up of course it
had no video but I could ssh in and grab the dmesg output, which is
attached to this message. dmesg had many drm-related debugging messages
and i915-related
Just in case my addition of i915 to initramfs was causing a problem with
drm-intel-next, I removed i915 from initramfs and repeated the test. The
result was the same, no video after a certain point in the boot process
with nomodeset using the drm-intel-next kernel as in #8.
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I installed kernel and modules and headers from
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/current/
and rebooted without nomodeset option. Same behavior: after the "loading
initramfs" message the screen blanks and never comes back.
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Based on a lead from an Arch Linux blog post, I tried adding the i915
module to the initramfs. This could possibly lead to earlier
initialization of the graphics device and it also seems consistent with
the DragonFlyBSD "probe early" patch I linked to in my initial bug
report which may have fixed
Also: booting without nomodeset kernel option for v5.1-rc2 kernel leads
to black screen, just as before. At that point the system cannot even be
switched to text console with ctrl-alt-Fn.
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Thanks for your help.
Unfortunately, no change after installing v5.1-rc2: Still stuck in
800x600 after booting with nomodeset kernel option.
Added kernel-bug-exists-upstream and marked confirmed.
dmesg output attached.
** Attachment added: "dmesg"
** Description changed:
Booting very new laptop hardware (ASUS Zenbook UX431FA) from 18.04 usb
install (also 18.10, also 19.04 daily) leads to black screen. Adding
"nomodeset" to kernel boot parameter gives 800x600 video only and
permits installing OS to disk. Applying updates and
Public bug reported:
Booting very new laptop hardware (ASUS Zenbook UX431FA) from 18.04 usb
install (also 18.10, also 19.04 daily) leads to black screen. Adding
"nomodeset" to kernel boot parameter gives 800x600 video only and
permits installing OS to disk. Applying updates and hardware
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