> Note the XX in the dump, which means an error occurred on the bus. > Please check your kernel logs to see if there is an error message > corresponding to this failure. If the I2C bus is unreliable, this could > explain in part the trouble you had. I read /var/log/dmesg.log and kern.log but I could not see an error or warning related to anything or I do not have the capability to see. > Comparing the original EDID with your tampered copy shows 6 bytes that > are now 0xff instead of the value they used to hold: > > 0x2b: 0x01 -> 0xff > 0x2e: 0x01 -> 0xff > 0x2f: 0x01 -> 0xff > 0x3b: 0x20 -> 0xff > 0x3f: 0x30 -> 0xff > 0x78: 0x33 -> 0xff > > FWIW, this doesn't correspond to a specific pattern for sensors-detect, > which accesses the following offsets for probing this specific address: > 0x00-0x07 and 0x3d-0x3f. So I still have no idea what happened and why. Maybe, this is a hardware problem and is a coincidence so that the time I use sensors-detect, the screen is "broken". > Assuming your EDID EEPROM is writable, the following commands (as root) > should restore its original state: > > # rmmod eeprom > # i2cset -y 2 0x50 0x2b 0x01 b > # i2cset -y 2 0x50 0x2e 0x01 b > # i2cset -y 2 0x50 0x2f 0x01 b > # i2cset -y 2 0x50 0x3b 0x20 b > # i2cset -y 2 0x50 0x3f 0x30 b > # i2cset -y 2 0x50 0x78 0x33 b > > You can check with i2cdump afterward. I'd even check after fixing the > first byte, as there is no point in going on if the first write failed Those commands worked without any error, I checked with i2cdump after first and last command. Rebooted but it is still using 1280x1023. I tried "radeon.modeset=0" parameter in grub and looked at /var/log/Xorg.0.log, it shows that II) RADEON(0): Panel Size from BIOS: 1280x1023 [ 16.704] (II) RADEON(0): BIOS provided dividers will be used. (WW) RADEON(0): LVDS Info: XRes: 1280, YRes: 1023, DotClock: 68940 HBlank: 128, HOverPlus: 16, HSyncWidth: 248 VBlank: 16, VOverPlus: 1, VSyncWidth: 3 and with radeon enabled [ 14.238369] [drm] Panel Size 1280x1023 16.560] (II) RADEON(0): Output LVDS using initial mode 1280x1023 If I use xrandr --outpur LVDS --mode "try", /var/log/Xorg.0.log says [ 1644.860] (II) RADEON(0): Allocate new frame buffer 1280x800 stride 1280 [ 1644.860] (II) RADEON(0): VRAM usage limit set to 50547K _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
