Re: [Intel-gfx] i915 black screen introduced by ACPI changes
Thanks Daniel I am recompiling the kernel. I will also open a bug in bugzilla when I collect all the relative information. Chris On Mon, Mar 4, 2013 at 9:50 AM, Daniel Vetter wrote: >> Two things to test: >> - Can you please check whether any of the backlight drivers in >> /sys/class/backlight does anything? You need to frob the brightness >> file. Please also list all the drivers you have. This is the good one before the acpi change. lrwxrwxrwx. 1 root root 0 Mar 4 15:05 acpi_video0 -> ../../devices/pci:00/:00:01.0/:01:00.0/backlight/acpi_video0 lrwxrwxrwx. 1 root root 0 Mar 4 15:05 acpi_video1 -> ../../devices/pci:00/:00:02.0/backlight/acpi_video1 lrwxrwxrwx. 1 root root 0 Mar 4 15:05 intel_backlight -> ../../devices/pci:00/:00:02.0/drm/card0/card0-LVDS-1/intel_backlight The brightness,actual_brightness and max_brightness are all 4648. >> - Please grab the lates git of intel-gpu-tools and attach the output >> of intel_reg_dumper for both a working and a broken kernel. The git >> tree is at: I attach the reg dump file here. Thanks Chris intel-reg-dump.good Description: Binary data ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] i915 black screen introduced by ACPI changes
On Mon, Mar 4, 2013 at 3:16 PM, Chris Li wrote: >>> Two things to test: >>> - Can you please check whether any of the backlight drivers in >>> /sys/class/backlight does anything? You need to frob the brightness >>> file. Please also list all the drivers you have. This is the kernel with the ACPI change causing the black screen. lrwxrwxrwx. 1 root root 0 Mar 4 15:20 acpi_video0 -> ../../devices/pci:00/:00:01.0/:01:00.0/backlight/acpi_video0 lrwxrwxrwx. 1 root root 0 Mar 4 15:20 acpi_video1 -> ../../devices/pci:00/:00:02.0/backlight/acpi_video1 lrwxrwxrwx. 1 root root 0 Mar 4 15:20 intel_backlight -> ../../devices/pci:00/:00:02.0/drm/card0/card0-LVDS-1/intel_backlight Here is the interesting part. The brightness and max_brightness is all set to 4648, However, the actual brightness is 0. The bl_power is also 0. I think you are on to some thing. I attach the reg dump as intel-reg-bad. Chris intel-reg-bad Description: Binary data ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] i915 black screen introduced by ACPI changes
On Mon, Mar 11, 2013 at 6:16 AM, Jani Nikula wrote: > Interesting snippets from your dmesgs: > > 1) good > > [0.00] Linux version 3.6.0-rc6+ (chr...@ideapad.lan) (gcc version > 4.7.2 20121109 (Red Hat 4.7.2-8) (GCC) ) #25 SMP Wed Feb 20 12:55:06 PST 2013 > ... > [5.341431] [drm:intel_panel_get_max_backlight], max backlight PWM = 4648 > [5.341442] [drm:intel_panel_actually_set_backlight], set backlight PWM = > 4648 > [5.342572] [drm:intel_panel_get_max_backlight], max backlight PWM = 4648 > [5.342578] [drm:intel_panel_actually_set_backlight], set backlight PWM = > 4648 > > 2) bad > > [0.00] Linux version 3.8.0-rc7+ (chr...@ideapad.lan) (gcc version > 4.7.2 20121109 (Red Hat 4.7.2-8) (GCC) ) #23 SMP Tue Feb 19 19:24:57 PST 2013 > ... > [5.692853] [drm:asle_set_backlight], bclp = 0x80ff > [5.692865] [drm:intel_panel_get_max_backlight], max backlight PWM = 4648 > [5.692870] [drm:intel_panel_actually_set_backlight], set backlight PWM = > 4648 > [5.693401] [drm:asle_set_backlight], bclp = 0x8000 > [5.693408] [drm:intel_panel_get_max_backlight], max backlight PWM = 4648 > [5.693413] [drm:intel_panel_actually_set_backlight], set backlight PWM = 0 > > (We've added another debug print to asle_set_backlight.) > > For some reason we get two asle requests in a row. In the good kernel > it's the same request twice, in the bad kernel the second requests is > for 0 backlight. The register dumps seem to confirm this. > > Please try a recent kernel, with and without the the bisected bad commit Hi, I did try the tip of Linus git tree. However I can't make the kernel boot regardless bad commit or not. The kernel just hang there after grub2 load the kernel and initram image. It looks like a different problem than the intel black screen because it don't even get to the point show any console print out. I will try the intel branch instead. Chris ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] i915 black screen introduced by ACPI changes
On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula wrote: > I've never used the acpi_osi= kernel parameter, but it looks like you > could workaround this with acpi_osi="!Windows 2012". Please check that > running the "bad" kernel. That did not work for me. Still have black screen on the tip of git. I did that to the gurb2-efi.cfg Here is my kernel cmdline: $ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-3.9.0-rc2+ root=UUID=75d90f06-bcdc-40c0-a3a3-7edf9af38d41 ro rd.md=0 rd.lvm=0 rd.dm=0 rd.luks=0 vconsole.keymap=us LANG=en_US.UTF-8 drm.debug=0xe "acpi_osi=!Windows\x202012" Chris ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] i915 black screen introduced by ACPI changes
On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula wrote: > Fun. The BIOS seems to ask for zero backlight. Maybe it means something > else for Windows 8. White is the new black or something. I did some experiment, I go to intel_backlight directory. It show brightness is 4648, but actual_brightness is 0. Then I do "echo 4648 > brightness", the screen actually come back to light. X window function properly. However, if I go to suspend and resume. It is black screen again. If I use the Fn+Brightness to adjust the brightness. It seems the ACPI brightness is set to lowest. One press of "Fn+Brightness up" will give me about 10% of the brightness. It does not feel like white is the new black. Chris ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] i915 black screen introduced by ACPI changes
On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula wrote: > I've never used the acpi_osi= kernel parameter, but it looks like you > could workaround this with acpi_osi="!Windows 2012". Please check that > running the "bad" kernel. I find out that I just can't set the acpi_osi="!Windows 2012" properly in grub2.cfg. Grub2 will second guess the quote and change it. So it end up Linux kernel will see "acpi_osi=!Windows\x202012" or some thing like that. However, I just find out that if I set acpi_osi=Linux the black screen will go away. That is one usable work around on the stock fedora kernel. Chris ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
