Messages in this thread |  | | Date | Wed, 21 Feb 2007 00:56:48 -0500 | From | Yaroslav Halchenko <> | Subject | Re: no backlight on radeon after recent kernel "upgrade"s |
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I am sorry on the delay
> > On Sun, 18 Feb 2007 23:46:16 -0500 Yaroslav Halchenko <kernel@onerussian.com> wrote: > > > Since the most recent successful for me kernel 2.6.19-rc6-mm1, I've > > > tried few times to build more recent snapshots and now finally > > > 2.6.20-mm2. In all those cases I have a sad outcome -- kernel boots but > > > >...< > > Is 2.6.20 broken? I assume the latest 2.6.20-gitN snapshot are failing.. -mm's have been failing since some time after .19-rc6-mm1. I believe I've tried 2.6.19-mm? with the same luck
> It would be extremely useful to know which kernel versions you tested > and which ones failed. There are a number of backlight changes which are > just in 2.6.20-mm1 and -mm2 which it would be useful to rule out or > identify as the cause. I didn't mention 2.6.20-mm1 and got to see -mm2 so it is the one which Iv'e tried, but, once again, I experienced the same issue with 19-mm? kernels.
I built 2.6.20-mm2 without backlight support $> grep BACKLIGH /boot/config-2.6.20-mm2 # CONFIG_BACKLIGHT_LCD_SUPPORT is not set # CONFIG_FB_BACKLIGHT is not set # CONFIG_FB_RIVA_BACKLIGHT is not set # CONFIG_FB_RADEON_BACKLIGHT is not set
that "eliminated" the problem. Also I can see the screen with pure 2.6.20 with backlight support (whatever it does since after loading lcd, backlight modules, my /sys/class/{lcd,backlight} are empty):
*$> grep BACKLIGH /boot/config-2.6.20 # CONFIG_FB_BACKLIGHT is not set CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_BACKLIGHT_CLASS_DEVICE=m CONFIG_BACKLIGHT_DEVICE=y
> Also, do you normally see files under /sys/class/lcd? nope... after I load lcd module, no files under :-/ regardless either it is mm or not. But there are files under /sys/class/backlight/ for mm2 compiled with backlight support (whenever the screen is dark as per my original email)
-- .-. =------------------------------ /v\ ----------------------------= Keep in touch // \\ (yoh@|www.)onerussian.com Yaroslav Halchenko /( )\ ICQ#: 60653192 Linux User ^^-^^ [175555]
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