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deutronium n00b
Joined: 15 Jan 2008 Posts: 16
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Posted: Thu Oct 11, 2012 12:44 pm Post subject: Randomly getting black screens on bootup |
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The console randomly becomes black during startup. I believe this is due to having both
an Intel and AMD graphics card.
I've compiled the Intel device driver into the kernel, with modesetting.
But not the radeon driver to avoid conflicts with fglrx.
I've pasted my kernel config here http://bpaste.net/show/50551/
I've setup support for VGA switcheroo, but the device doesn't seem to be created in /sys.
Thanks in advance |
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audiodef Watchman
Joined: 06 Jul 2005 Posts: 6639 Location: The soundosphere
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deutronium n00b
Joined: 15 Jan 2008 Posts: 16
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Posted: Thu Oct 11, 2012 1:32 pm Post subject: |
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Sorry yeah, they can't be enabled both at once, it's called 'switchable graphics' apparently.
There aren't any BIOS settings unfourtunately. |
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Hu Moderator
Joined: 06 Mar 2007 Posts: 21518
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Posted: Fri Oct 12, 2012 1:24 am Post subject: |
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Does it work if you have only one graphics driver? The phrasing of your first post implies that you are attempting to use both the open Intel driver and the proprietary AMD driver. |
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deutronium n00b
Joined: 15 Jan 2008 Posts: 16
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Posted: Fri Oct 12, 2012 7:57 pm Post subject: |
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Even with fglrx blacklisted i still randomly get black screens at startup which is really frustrating! |
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deutronium n00b
Joined: 15 Jan 2008 Posts: 16
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Posted: Sat Oct 13, 2012 6:04 pm Post subject: |
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I've enabled a framebuffer, and found there seems to be a bug when the intel driver is loading which sometimes seems to make the display go blank.
Weirdly if you load i915, fglrx and X straight away the display then works.
#!/bin/bash
sudo insmod /lib/modules/3.4.9-gentoo/kernel/drivers/gpu/drm/i915/i915.ko
sudo modprobe fglrx
startxfce4
But I don't think this is an especially good solution. |
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Matias Jose Seco n00b
Joined: 24 Sep 2011 Posts: 22
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Posted: Sat Oct 13, 2012 9:46 pm Post subject: |
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Are you encountering the following dmesg alert?
Code: | [Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness |
If so, your issue could be the same as described here
Moreover, if that's the case, there where proposed some workarounds |
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