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The Doctor Moderator
Joined: 27 Jul 2010 Posts: 2678
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Posted: Fri Aug 23, 2013 6:54 pm Post subject: modesetting i915, paradox[solved] |
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My new laptop has a most annoying problem I specifically got an intel card so it would be pain free. This isn't the case.
When booting, my screen goes black unless I add 'nomodeset' to the kernel command line. Naturally, this results in startx failing with the famous Fatal server error: (EE) no screens found(EE) since i915 requires modesetting to be enabled.
So I seem to have a chicken and the egg problem: I can't let modesetting be enabled for boot up and log in and I can't use X without it.
It seems like there should be some middle ground here where I stop my screen from going black without killing X. Any ideas?
EDIT:
Intel was turning the backlight off, so naturally the screen was going black. Added i915 invert_brightness=1 to the kernel parameters, and now it works http://people.skolelinux.org/pere/blog/Fixing_the_Linux_black_screen_of_death_on_machines_with_Intel_HD_video.html _________________ First things first, but not necessarily in that order.
Apologies if I take a while to respond. I'm currently working on the dematerialization circuit for my blue box. |
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eccerr0r Watchman
Joined: 01 Jul 2004 Posts: 9679 Location: almost Mile High in the USA
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Posted: Fri Aug 23, 2013 10:35 pm Post subject: |
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Curious, what hardware is this?
I see a lot of people with recent HP laptops do this. The laptop that I have that has this issue is an HP Envy4. I ended up using this in my kernel boot command line:
Code: | video.use_bios_initial_backlight=0 |
I don't know if it was the exact same problem but the key indication I had was that it was I could brighten the display when it was dark to turn on the backlight. _________________ Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching? |
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The Doctor Moderator
Joined: 27 Jul 2010 Posts: 2678
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Posted: Sat Aug 24, 2013 12:41 am Post subject: |
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Its a Lenovo G780 with an Intel video card. _________________ First things first, but not necessarily in that order.
Apologies if I take a while to respond. I'm currently working on the dematerialization circuit for my blue box. |
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windz Tux's lil' helper
Joined: 07 May 2006 Posts: 89
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Posted: Tue Aug 27, 2013 2:14 pm Post subject: Re: modesetting i915, paradox[solved] |
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Do you have any problems adjusting the screen brightness after booting up with i915 invert_brightness=1? For my case, after using this parameter, the display brightens when I dim it and vice versa. I can adjust brightness on my laptop (Lenovo G400s) using three methods: The brightness keys on the keyboard, adjusting the values in /sys/class/backlight/acpi_video0 or /sys/class/backlight/intel_backlight and using xbacklight. But all three present with the same result: Screen brightens when you dim it and dims when you brighten it. |
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eccerr0r Watchman
Joined: 01 Jul 2004 Posts: 9679 Location: almost Mile High in the USA
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Posted: Tue Aug 27, 2013 2:25 pm Post subject: |
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I think some machines have it reversed, perhaps the Lenovo it was reversed. On my HP, somehow it said the brightness was 0 and the driver obliged to keep it that way, making the screen black out... _________________ Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching? |
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