https://bugzilla.novell.com/show_bug.cgi?id=433788 Christian Zoz changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |zoz@novell.com Priority|P5 - None |P4 - Low -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User sdelcroix@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c3 Stephane Delcroix changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sdelcroix@novell.com Status|NEEDINFO |NEW Info Provider|sdelcroix@novell.com | --- Comment #3 from Stephane Delcroix 2008-10-14 06:02:13 MDT --- (In reply to comment #2 from Holger Macht)

Please post the output of 'find /sys/class/backlight/'.

/sys/class/backlight/ /sys/class/backlight/acpi_video0

You should have at least one acpi_video0 directory in there with files like 'brightness' and 'max_brightness'. Does it work if you echo some values to the brightness file?

changing the brightness does not change the real screen brightness, but the actual_brightness value is updated -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User sdelcroix@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c5 --- Comment #5 from Stephane Delcroix 2008-10-15 04:13:01 MDT --- just to close a door, I updated my bios to latest 1.20, no changes. this was expected as it was working in 11.0 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User hmacht@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c7 --- Comment #7 from Holger Macht 2008-11-03 05:49:37 MDT --- Thomas, patches.arch/acpi_video_thinkpad_exclude_IGD_devices.patch says: + * Ugly SLE11 hack to let thinkpad_acpi handle brightness on + * ThinkPad IGD devices but thinkpad_acpi is not loaded with brightness support (brighntness_enable=1), thus, cannot handle it. Can this be correct? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User delder@novacoast.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c9 Dan Elder changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jhodge@novell.com --- Comment #9 from Dan Elder 2008-11-03 11:26:52 MST --- *** Bug 440283 has been marked as a duplicate of this bug. *** https://bugzilla.novell.com/show_bug.cgi?id=440283 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User delder@novacoast.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c12 Dan Elder changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |delder@novacoast.com --- Comment #12 from Dan Elder 2008-11-07 17:40:14 MST --- This is still in beta 4 and is making it very difficult to test as most of the time my screen is too dim to read. Is there any progress on this? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User trenn@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c14 Thomas Renninger changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED --- Comment #14 from Thomas Renninger 2008-11-09 07:44:02 MST --- This should be more or less the same than the boot param: acpi_backlight=vendor which should be default on ThinkPads (maybe this is the bug that it's not default). You may also want to try: acpi_backlight=video but this does not work on latest ThinkPads. Also invoke in a shell: acpi_listen If you press the brightness up/down keys, do you see a line popping up then? If yes, please paste it here. Can you log into the machine remotely via ssh? This would make it easier for you to test if the screen is dimmed by default. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User trenn@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c15 --- Comment #15 from Thomas Renninger 2008-11-09 07:45:15 MST --- Could someone also attach full dmesg output, pls. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User hi-du@gmx.de added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c17 --- Comment #17 from Tom Meyer 2008-11-09 08:10:16 MST --- thinkpad x300 acpi_listen: ^@ibm/hotkey HKEY 00000080 00001011 ^@video LCD0 00000087 00000000 ^@ibm/hotkey HKEY 00000080 00001010 ^@video LCD0 00000086 00000000 btw: a crazy thing is if I run 'mc' and use the 'fn+brightness' buttons mc goes 2 file entries down.. hmh.. :) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User trenn@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c19 Thomas Renninger changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |NEEDINFO Info Provider| |sdelcroix@novell.com --- Comment #19 from Thomas Renninger 2008-11-10 06:50:10 MST --- The IGD detection does not work. Please try the kernel from here: ftp.suse.com/pub/people/trenn/thinkpad_brightness_workaround You need to install the -default and -base-default kernel. Then pass boot parameter: acpi_backlight=thinkpad_igd Does this work? Can you also attach acpidump and dmidecode info, pls. Then I can adjust the IGD detection to match your machine. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User delder@novacoast.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c21 --- Comment #21 from Dan Elder 2008-11-10 08:38:02 MST --- On a Thinkpad T61 I for acpi_listen I get: ibm/hotkey HKEY 00000080 00001010 video LCD0 00000086 00000000 ibm/hotkey HKEY 00000080 00005010 ibm/hotkey HKEY 00000080 00001011 video LCD0 00000087 00000000 ibm/hotkey HKEY 00000080 00005010 ibm/hotkey HKEY 00000080 00005010 ibm/hotkey HKEY 00000080 00001010 video LCD0 00000086 00000000 ibm/hotkey HKEY 00000080 00005010 ibm/hotkey HKEY 00000080 00005010 ibm/hotkey HKEY 00000080 00001011 video LCD0 00000087 00000000 ibm/hotkey HKEY 00000080 00005010 ibm/hotkey HKEY 00000080 00005010 It looks like brightness_enable=1 finally gives me the correct value but without the ability to set it: linux:~ # cat /sys/class/backlight/thinkpad_screen/brightness 13 linux:~ # echo "100" > /sys/class/backlight/thinkpad_screen/brightness -bash: echo: write error: Invalid argument linux:~ # echo 100 > /sys/class/backlight/thinkpad_screen/brightness -bash: echo: write error: Invalid argument I'll try the modified kernel today and see if everything works well, many thanks. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User sdelcroix@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c23 --- Comment #23 from Stephane Delcroix 2008-11-10 12:50:08 MST --- (In reply to comment #14 from Thomas Renninger)

Also invoke in a shell: acpi_listen

on x61t: ibm/hotkey HKEY 00000080 00001010 video LCD0 00000086 00000000 ibm/hotkey HKEY 00000080 00001011 video LCD0 00000087 00000000 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User sdelcroix@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c25 --- Comment #25 from Stephane Delcroix 2008-11-10 13:12:43 MST --- Created an attachment (id=251137) --> (https://bugzilla.novell.com/attachment.cgi?id=251137) dmidecode on x61t -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User delder@novacoast.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c27 --- Comment #27 from Dan Elder 2008-11-10 21:02:47 MST --- I also tried that kernel and it didn't help. Passing acpi_backlight=vendor to grub did seem to help although I also was able to use the Fn keys to make my screen 100% bright before booting the system so I'm not sure if acpi_backlight=vendor really did the trick. The main problem I had with everything I've been trying so far is that often I would be able to control the screen brightness with the Fn keys but /sys/class/backlight/thinkpad_screen/brightness and the gnome osd for the screen brightness would disagree. As an example, my screen would often be at 13% brightness (according to /sys/class/backlight/thinkpad_screen/brightness) but using the Fn keys to make it brighter would show that the slider was already at 100%. I could make it dimmer from there and also brighter but 100% on the gnome osd slider would still only be 13% "real" brightness. Maybe adjusting the screen brightness before the system booted just got the two values back in sync? I'll post dump values shortly. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User delder@novacoast.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c29 --- Comment #29 from Dan Elder 2008-11-10 21:04:58 MST --- Created an attachment (id=251195) --> (https://bugzilla.novell.com/attachment.cgi?id=251195) acpidump output running stock kernel (2.6.27.4-2-default) with acpi_backlight=vendor on T61 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User sdelcroix@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c31 --- Comment #31 from Stephane Delcroix 2008-11-18 02:33:36 MST --- Still present in beta5 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User trenn@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c33 Thomas Renninger changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |aj@novell.com --- Comment #33 from Thomas Renninger 2008-11-22 17:04:10 MST --- *** Bug 437454 has been marked as a duplicate of this bug. *** https://bugzilla.novell.com/show_bug.cgi?id=437454 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User delder@novacoast.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c35 --- Comment #35 from Dan Elder 2008-11-25 22:58:27 MST --- This also works for me now on T61 (using 2.6.27.7-HEAD_20081123121057-default), thanks. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User trenn@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c37 --- Comment #37 from Thomas Renninger 2008-12-03 02:02:56 MST --- Can the others please double check whether they are also seeing this. Instead of "/proc/acpi/ibm/brightness" better look at: /sys/class/backlight/... for your supported amount of backlight levels. (or both, they "should" be in-sync...) Irene: I very much expect you have this change, just to be sure, please double check whether you have: ------- Thu Nov 20 13:27:57 CET 2008 - trenn@suse.de .. Fix missing bit for ThinkPad brightness switching: - patches.arch/acpi_video_thinkpad_exclude_IGD_devices.patch: Do not use video backlight switching for Lenovo ThinkPads. ------- in rpm -q --changelog kernel-default |less of your installed kernel or rpm -qp --changelog kernel-default.rpm |less in the kernel package of your running kernel. This is the fix for this bug, but may cause the double switching on yours. IGD aka Opregion driven brightness switching has a hack/workaround added to explicitly grab the key and set the brightness, while in other case the key is processed by ACPI internally. Next, please do: dmesg |grep -i igd There should be a line: "Found IGD device" (from the core ACPI parts) and "IGD device detected - take over backlight switching" (from the thinkpad_acpi driver) Can you confirm seeing this or maybe there already something goes wrong? What ThinkPad model do you use? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User sdelcroix@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c39 --- Comment #39 from Stephane Delcroix 2008-12-03 06:14:32 MST --- (In reply to comment #37 from Thomas Renninger)

Can the others please double check whether they are also seeing this.

confirmed. 15 levels, with a step of 2. But I'm not complaining, I think it's a good default -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User trenn@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c41 --- Comment #41 from Thomas Renninger 2008-12-11 06:33:37 MST --- I reproduced this on a R400. I get 15 levels with a step of 3. The problem is the second graphics card on the R400. Both, the Intel and the Radeon graphics card are visible in the pci layer, thus the ACPI devices of both get activated, resulting in double switching. This is a more complex problem. I have to read up the acpi list whether it already got discussed, otherwise I'll bring it up. IMO we should open a separate bug for that, this one was about not being able to switch brightness at all which is fixed. Irene: Sorry for the late reply. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=433788 User marcosgdavid@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=433788#c43 Marcos David changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |marcosgdavid@gmail.com --- Comment #43 from Marcos David 2009-02-03 07:56:54 MST --- Hi, I'm also experiencing this issue on a Toshiba Tecra M10. Funny thing is i can change the brightness in console mode, but not on X. Once I have X running, the only way to change the brightness is by doing Ctrl+F1 using the brightness keys and going back to X with (ctrl+F7). I've checked that the acpi events are captured and that /sys/devices/backlight/toshiba/actual_brightness is updated. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.